Roman–Persian Wars

Roman–Persian Wars

Infobox Military Conflict
conflict=Roman–Persian Wars

date=92 BC – 627 AD
place=Mesopotamia, Transcaucasus, Atropatene, Asia Minor, Syria, Palestine, Egypt
result=Status quo ante bellum
territory=Roman acquisition of upper Mesopotamia; partition of the Transcaucasus
combatant1=Roman Republic, succeeded by Roman Empire and Eastern Roman Empire later, plus allies¹
combatant2=Parthian and Sassanid Persian empires and allies²
commander1=Lucullus, Pompey, CrassusKIA, Mark Antony, Ventidius, Corbulo, Trajan, Avidius Cassius, Statius Priscus, Septimius Severus, Caracalla, Macrinus, Alexander Severus, Timesitheus, Gordian III, ValerianPOW, Ballista, Odaenathus, Carus, Galerius, Constantius II, JulianKIA, Jovian, Ardaburius, Hypatius, Patricius, Areobindus, Celer, Belisarius, Sittas, Al-Harith ibn Jabalah, Dagistheus, Bessas, Marcian, Justinian, Al-Mundhir ibn al-Harith, Maurice, John Mystacon, Philippicus, Comentiolus, Narses GermanusKIA, Leontius, Domentziolus, Priscus, Heraclius,
commander2=Phraates III, Surena, Pacorus IKIA, Quintus LabienusKIA, Artabanus II, Vologases I, Vologases IV, Ardashir I, Shapur I, Narseh, Shapur II, NarsehKIA, Narseh, Bahram V, Yazdegerd II, Kavadh I, Mihran, Mihr-MihroePOW, Azarethes, Khosrau I, Al-Mundhir IV ibn al-MundhirKIA, KhorianesKIA, Adarmahan, TamkhusroKIA, Varaz Vzur, Mahbodh, Kardarigan, Bahram Chobin, ZatsparhamKIA, Khosrau II,
Shahin, ShahraplakanKIA, RhahzadhKIA
notes= ¹ Allies of the Romans: Armenia, Iberia, Albania, Commagene, Nabataeans, Osroene, Palmyra, Ghassanids, Lazica, Aksumite Empire, Khazars ² Allies of the Parthians/Sassanids: Osroene, Armenia, Iberia, Albania, Lakhmids, Lazica, Avars

The Roman–Persian Wars were a series of conflicts between the Greco-Roman world and two successive Iranian empires. Contact between Parthia and the Roman Republic began in 92 BC; wars began under the late Republic, and continued through the Roman and Sassanid empires. They were brought to an end by the Arab Muslim invasions, which struck both empires with shattering effect shortly after the end of the last war between them.

Although warfare between the Romans and the Iranians lasted for seven centuries, the frontier remained largely stable. A game of tug of war ensued: towns, fortifications, and provinces were continuously sacked, captured, destroyed, and changing sides frequently. Neither side had the logistical strength or manpower to maintain such lengthy campaigns so far from their borders, and thus neither could advance too far without risking stretching their frontiers too thin. Both sides did make conquests beyond the border, but the balance was almost always restored in time. The line of stalemate shifted in the second century AD: it had run along the northern Euphrates; the new line ran east, or later northeast, across Mesopotamia to the northern Tigris. There were also several substantial shifts further north, in Armenia and the Caucasus.

The resources expended during the Roman–Persian Wars ultimately proved catastrophic for both empires. The prolonged and escalating warfare of the sixth and seventh centuries left them exhausted and vulnerable in the face of the sudden emergence and expansion of the Caliphate, whose forces invaded both empires only a few years after the end of the last Roman–Persian war. Benefiting from their weakened condition, the Arab Muslim armies swiftly conquered the entire Sassanid Empire and deprived the Eastern Roman Empire of its Near Eastern and North African territories.

Historical background

According to James Howard-Johnston, "from the third century BC to the early seventh century AD, the rival players [in the East] were grand polities with imperial pretensions, which had been able to establish and secure stable territories transcending regional divides". [Howard-Johnston (2006), 1] The Romans and Parthians came into contact through their respective conquests of parts of the Seleucid Empire. During the third century BC, the Parthians migrated from the Central Asian steppe into northern Iran. Although subdued for a time by the Seleucids, in the second century they broke away and established an independent state that steadily expanded at the expense of their former rulers, conquering Persia and Mesopotamia. Ruled by the Arsacid dynasty, the Parthians fended off several Seleucid attempts to regain their lost territories, and extended their rule deep into India.Ball (2000), 12–13; Dignas–Winter (2007), [ 9] (PDF)] Meanwhile the Romans expelled the Seleucids from their territories in Anatolia in the early second century BC, after defeating Antiochus III the Great at Thermopylae and Magnesia. Finally, in 64 BC Pompey conquered the remaining Seleucid territories in Syria, extinguishing their state and advancing the Roman eastern frontier to the Euphrates, where it met the territory of the Parthians.

Roman–Parthian Wars

Roman Republic vs Parthia

Parthian enterprise in the West began in the time of Mithridates I and was revived by Mithridates II, who negotiated unsuccessfully with Lucius Cornelius Sulla for a Roman–Parthian alliance (c. 105 BC). [Plutarch, "Sulla", 5. [*.html 3–6] * Mackay (2004), 149; Sherwin-White (1994), 262] When Lucullus invaded Southern Armenia and led an attack against Tigranes in 69 BC, he corresponded with Phraates III to dissuade him from intervening. Although the Parthians remained neutral, Lucullus considered attacking them. [Bivar (1993), 46 * Sherwin-White (1994), 262–263] In 66–65 BC, Pompey reached agreement with Phraates, and Roman–Parthian troops invaded Armenia, but a dispute soon arose over the Euphrates boundary. Finally, Phraates asserted his control over Mesopotamia, except for the western district of Osroene, which became a Roman dependency. [Sherwin-White (1994), 264]

The Roman general Marcus Licinius Crassus led an invasion of Mesopotamia in 53 BC with catastrophic results; he and his son Publius were killed at the Battle of Carrhae by the Parthians under General Surena; this was the worst Roman defeat since the Battle of Cannae. [Plutarch, "Crassus", [*.html 23–32] * Mackay (2004), 150] The Parthians raided Syria the following year, and mounted a major invasion in 51 BC, but their army was caught in an ambush near Antigonea by the Romans, and they were driven back. [Bivar (1993), 56]

The Parthians largely remained neutral during Caesar's civil war, fought between forces supporting Julius Caesar and forces supporting Pompey and the traditional faction of the Roman Senate. However, they maintained relations with Pompey, and after his defeat and death, a force under Pacorus I assisted the Pompeian general Caecilius Bassus, who was besieged at Apamea Valley by Caesarian forces. With the civil war over, Julius Caesar prepared a campaign against Parthia, but his assassination averted the war. The Parthians supported Brutus and Cassius during the ensuing Liberators' civil war and sent a contingent to fight on their side at the Battle of Philippi in 42 BC. [Justin, "Historiarum Philippicarum", XLII. [ 4] * Bivar (1993), 56–57] After the Liberators' defeat, the Parthians invaded Roman territory in 40 BC in conjunction with the Roman Quintus Labienus, a former supporter of Brutus and Cassius. They swiftly overran the Roman province of Syria and advanced into Judaea, overthrowing the Roman client Hyrcanus II and installing his nephew Antigonus. For a moment, the whole of the Roman East seemed lost to the Parthians or about to fall into their hands. However, the conclusion of the second Roman civil war soon revived Roman strength in Asia. [Bivar (1993), 57] Mark Antony had sent Ventidius to oppose Labienus, who had invaded Anatolia. Soon Labienius was driven back to Syria by Roman forces, and, although reinforced by the Parthians, was defeated, taken prisoner, and killed. After suffering a further defeat near the Syrian Gates, the Parthians withdrew from Syria. They returned in 38 BC but were decisively defeated by Ventidius, and Pacorus was killed. In Judaea, Antigonus was ousted with Roman help by Herod in 37 BC. [Justin, "Historiarum Philippicarum", XLII. [ 4] ; Plutarch, "Antony", [*.html 33–34] * Bivar (1993), 57–58] With Roman control of Syria and Judaea restored, Mark Antony led a huge army into Atropatene (present-day Azerbaijan), but his siege train and its escort were isolated and wiped out, while his Armenian allies deserted. Failing to make progress against Parthian positions, the Romans withdrew with heavy casualties. Antony was again in Armenia in 33 BC to join with the Median king against Octavian and the Parthians. Other preoccupations obliged him to withdraw, and the whole region came under Parthian control. [Cassius Dio, "Roman History", XLIX, [*.html 27–33] * Bivar (1993), 58–65]

Roman Empire vs Parthia

With tensions between the two powers threatening renewed war, Gaius Caesar and Phraataces worked out a compromise in 1 AD. According to the agreement, Parthia undertook to withdraw its forces from Armenia and to recognize a "de facto" Roman protectorate there. Nonetheless, Roman–Persian rivalry over control and influence in Armenia continued unabated for the next several decades. [Sicker (2000), 162] The decision of the Parthian King Artabanus II to place his son on the vacant Armenian throne triggered a war with Rome in 36 AD, which ended when Artabanus abandoned claims to a Parthian sphere of influence in Armenia. [Sicker (2000), 162–163] War erupted in 58 AD, after the Parthian King Vologases I forcibly installed his brother Tiridates on the Armenian throne. [Tacitus, "Annals", XII. * Sicker (2000), 163] Roman forces overthrew Tiridates and replaced him with a Cappadocian prince, triggering an inconclusive war. This came to an end in 63 AD after the Romans agreed to allow Tiridates and his descendants to rule Armenia on condition that they receive the kingship from the Roman emperor. [Tacitus, "Annals", XV. * Rawlinson (2007), 286–287]

A fresh series of conflicts began in the second century AD, during which the Romans consistently held the upper hand over Parthia. The Emperor Trajan invaded Armenia and Mesopotamia during 114 and 115 and annexed them as Roman provinces. He captured the Parthian capital, Ctesiphon, before sailing downriver to the Persian Gulf.Sicker (2000), 167] However, uprisings erupted in 115 in the occupied Parthian territories, while a major Jewish revolt broke out in Roman territory, severely stretching Roman military resources. Parthian forces attacked key Roman positions, and the Roman garrisons at Seleucia, Nisibis and Edessa were expelled by the local inhabitants. Trajan subdued the rebels in Mesopotamia, but having installed the Parthian prince Parthamaspates on the throne as a client ruler, he withdrew his armies and returned to Syria. Trajan died in 117, before he was able to reorganize the effort to consolidate Roman control over the Parthian provinces.Cassius Dio, "Roman History", LXVIII, [*.html 33] * Sicker (2000), 167–168]

Trajan's Parthian War initiated a "shift of emphasis in the 'grand strategy of the Roman empire' ", but his successor, Hadrian, decided that it was in Rome's interest to re-establish the Euphrates as the limit of its direct control. Hadrian returned to the "status quo ante", and surrendered the territories of Armenia, Mesopotamia, and Adiabene to their previous rulers and client-kings. [Lightfoot (1990), 115: "Trajan succeeded in acquiring territory in these lands with a view to annexation, something which had not seriously been attempted before [...] Although Hadrian abandoned all of Trajan's conquests [...] the trend was not to be reversed. Further wars of annexation followed under Lucius Verus and Septimius Severus."; Sicker (2000), 167–168]

War over Armenia broke out again in 161, when Vologases IV defeated the Romans there, captured Edessa and ravaged Syria. In 163 a Roman counter-attack under Statius Priscus defeated the Parthians in Armenia and installed a favored candidate on the Armenian throne. The following year Avidius Cassius invaded Mesopotamia, winning battles at Dura-Europos and Seleucia and sacking Ctesiphon in 165. An epidemic which was sweeping Parthia at the time, possibly of smallpox, spread to the Roman army and forced its withdrawal. [Sicker (2000), 169] In 195–197, a Roman offensive under the Emperor Septimius Severus led to Rome's acquisition of northern Mesopotamia as far as the areas around Nisibis, Singara and the sacking of Ctesiphon. [Herodian, Roman History, III, [ 9.1–12] Campbell (2005), 6–7; Rawlinson (2007), 337–338] A final war against the Parthians was launched by the Emperor Caracalla, who sacked Arbela in 216. After his assassination, his successor, Macrinus, was defeated by the Parthians near Nisibis. In exchange for peace, he was obliged to pay for the damage caused by Caracalla. [Herodian, Roman History, IV, [ 10.1–15.9] Campbell (2005), 20]

Roman–Sassanid Wars

Early Roman–Sassanid conflicts

Conflict resumed shortly after the overthrow of Parthian rule and Ardashir I's foundation of the Sassanid empire. Ardashir raided Mesopotamia and Syria in 230 AD and demanded the cession of all the former territories of the Achaemenid Empire. [Herodian, "Roman History", VI, [ 2.1–6] ; Cassius Dio, "Roman History", LXXX, [*.html 4.1–2] * Dodgeon–Greatrex–Lieu (2002), I, 16] After fruitless negotiations, Alexander Severus set out against Ardashir in 232 and finally repulsed him. [Herodian, "Roman History", VI, [ 5.1–6] * Dodgeon–Greatrex–Lieu (2002), I, 24–28; Frye (1993), 124] In 238–240, towards the end of his reign, Ardashir attacked again, taking several cities in Syria and Mesopotamia, including Carrhae and Nisibis. [Frye (1993), 124–125; Southern (2001), 234–235] The struggle resumed and intensified under Ardashir's successor Shapur I, who invaded Mesopotamia. His forces were defeated at a battle near Resaena in 243 and the Romans regained Carrhae and Nisibis. [Frye (1993), 125] Encouraged by this, the Roman Emperor Gordian III advanced down the Euphrates but was repelled near Ctesiphon at the Battle of Misiche in 244. [Aurelius Victor, "Liber de Caesaribus", 27. [ 7–8] ; Sibylline Oracles, XIII, [ 13–20] * Frye (1993), 125; Southern (2001), 235]

In the early 250s, the emperor Philip was involved in a struggle over the control of Armenia. Shapur had the Armenian king murdered and re-opened hostilities against the Romans, defeating them at the Battle of Barbalissos, and then probably taking and plundering Antioch. [Frye (1993), 125; Southern (2001), 235–236] Between 258 and 260, Shapur captured the Emperor Valerian I after defeating his army at the Battle of Edessa, and advanced into Anatolia. However, defeats at the hands of Roman forces there and attacks from Odaenathus of Palmyra forced the Persians to withdraw from Roman territory. [Lactantius, "De Mortibus Persecutorum", [ 5] ; Sibylline Oracles, XIII, [ 155–171] * Frye (1993), 126; Southern (2001), 238]

The Emperor Carus launched a successful invasion of Persia in 283, sacking Ctesiphon, the Sassanid capital. The Romans would probably have extended their conquests if Carus had not died in December of that year. [Aurelius Victor, "Liber de Caesaribus", 38. [ 2–4] ; Eutropius, "Abridgment of Roman History", IX, [ 18.1] * Frye (1993), 128; Southern (2001), 241] After a brief peace early in Diocletian's reign, the Persians renewed hostilities when they invaded Armenia and defeated the Romans outside Carrhae in either 296 or 297. [Frye (1993), 130; Southern (2001), 242] However, Galerius crushed the Persians in battle in 298, capturing the treasury and the royal harem, an utter disgrace for the Persian monarch. The resulting peace settlement gave the Romans control of the area between the Tigris and the Greater Zab. This was the most decisive Roman victory for many decades; all the territories that had been lost, all the debatable lands, and control of Armenia lay in Roman hands. [Aurelius Victor, "Liber de Caesaribus", 39. [ 33–36] ; Eutropius, "Abridgment of Roman History", IX, [ 24–25.1] * Frye (1993), 130–131; Southern (2001), 243]

The arrangements of 299 lasted until the mid-330s, when Shapur II began a series of offensives against the Romans. Despite a string of victories in battle, his campaigns achieved little lasting effect: three Persian sieges of Nisibis were repulsed, and while Shapur succeeded in taking Amida and Singara, both cities were soon regained by the Romans. [Frye (1993), 130; Southern (2001), 242] Following a lull during the 350s while Shapur fought off nomad attacks on Persia's northern frontier, he launched a new campaign in 359 and again captured Amida. This provoked a major offensive in 363 by the Roman Emperor Julian, who advanced down the Euphrates to Ctesiphon. [Frye (1993), 137] Julian won the Battle of Ctesiphon but was unable to take the Persian capital and retreated along the Tigris. Harried by the Persians, Julian was killed in a skirmish. With the Roman army stuck on the eastern bank of the Euphrates, Julian's successor Jovian made peace, agreeing major concessions in exchange for safe passage out of Sassanid territory. The Romans surrendered their former possessions east of the Tigris, as well as Nisibis and Singara, and Shapur soon conquered Armenia. [Frye (1993), 138] In 384, a definitive peace treaty was signed by Shapur III and Theodosius I, which divided Armenia between the two states. Meanwhile, the northern territories of the Roman empire were invaded by Eurasian nomads, while Persia's northern borders were threatened by Hephthalites. With both empires preoccupied by these threats, a largely peaceful period followed, interrupted only by two brief wars, the first in 421–422 and the second in 440. [Bury (1923), [*.html XIV.1] ; Frye (1993), 145; Greatrex-Lieu (2002), II, 37–51]

Anastasian War

War broke out when the Persian King Kavadh I attempted to gain financial support by force from the Roman Emperor Anastasius I. [Procopius, "Wars", I.7.1–2
* Greatrex–Lieu (2002), II, 62
] In 502 AD, he quickly captured the unprepared city of Theodosiopolis [Joshua the Stylite, "Chronicle", [ XLIII]
* Greatrex–Lieu (2002), II, 62
] and besieged Amida. The siege of the fortress-city proved to be far more difficult than Kavadh expected; the defenders repelled the Persian assaults for three months before they were beaten. [Zacharias Rhetor, "Historia Ecclesiastica", VII, 3–4 * Greatrex–Lieu (2002), II, 63] In 503, the Romans attempted an ultimately unsuccessful siege of the Persian-held Amida while Kavadh invaded Osroene and laid siege to Edessa with the same results. [Greatrex–Lieu (2002), I I, 69–71] Finally in 504, the Romans gained control through the renewed investment of Amida, which led to the fall of the city. That year an armistice was reached as a result of an invasion of Armenia by the Huns from the Caucasus. Although the two powers negotiated, it was not until November 506 that a treaty was agreed to. [Procopius, "Wars", I.9.24
* Greatrex–Lieu (2002), II, 77
] In 505, Anastasius ordered the building of a great fortified city at Dara. At the same time, the dilapidated fortifications were also upgraded at Edessa, Batnac and Amida. [Joshua the Stylite, "Chronicle", [ XC]
* Greatrex–Lieu (2002), II, 74
] Although no further large-scale conflict took place during Anastasius' reign, tensions continued, especially while work proceeded at Dara. This was because the construction of new fortifications in the border zone by either empire had been prohibited by a treaty concluded some decades earlier. Anastasius pursued the project despite Persian objections, and the walls were completed by 507–508. [Joshua the Stylite, "Chronicle", [ XCIII–XCIV]
* Greatrex–Lieu (2002), II, 77

Iberian War

In 524–525 AD, Kavadh proposed that Justin I adopt his son, Khosrau, but the negotiations soon broke down.Procopius, "Wars", I.11.23–30 * Greatrex (2005), 487; Greatrex–Lieu (2002), II, 81–82] Tensions between the two powers erupted into conflict when Iberia under King Gourgen defected to the Romans in 524–525.Greatrex–Lieu (2002), II, 82] Overt Roman–Persian fighting had broken out in the Transcaucasus region and upper Mesopotamia by 526–527.Greatrex–Lieu (2002), II, 84] The early years of war favored the Persians: by 527, the Iberian revolt had been crushed, a Roman offensive against Nisibis and Thebetha in that year was unsuccessful, and forces trying to fortify Thannuris and Melabasa were prevented from doing so by Persian attacks.Zacharias Rhetor, "Historia Ecclesiastica", IX, 2 * Greatrex–Lieu (2002), II, 83, 86] Attempting to remedy the deficiencies revealed by these Persian successes, the new Roman emperor, Justinian I, reorganized the eastern armies. [Greatrex–Lieu (2002), II, 85]

In 530 a major Persian offensive in Mesopotamia was defeated by Roman forces under Belisarius at Dara, while a second Persian thrust in the Caucasus was defeated by Sittas at Satala. Belisarius was defeated by Persian and Lakhmid forces at the Battle of Callinicum in 531. In the same year the Romans gained some forts in Armenia, while the Persians had captured two forts in eastern Lazica.Greatrex–Lieu (2002), II, 92–96] Immediately after the failure at Callinicum the Persians and Romans negotiated without success.Greatrex–Lieu (2002), II, 93] The two sides re-opened talks in spring 532 and finally signed the Eternal Peace in September 532, which lasted less than eight years. Both powers agreed to return all occupied territories, and the Romans agreed to make a one-time payment of 110 "centenaria" (11,000 lbs of gold). Iberia remained in Persian hands, and the Iberians who had left their country were given the choice of remaining in Roman territory or returning to their native land. [Evans (2000), 118; Greatrex–Lieu (2002), II, 96–97]

Justinian vs Khosrau I

250px|thumb|left|Roman and Sassanid Empires during Justinian's reign

The Persians broke the "Treaty of Eternal Peace" in 540 AD, probably in response to the Roman reconquest of much of the former western empire, which had been facilitated by the cessation of war in the East. Khosrau I invaded and devastated Syria, extorting large sums of money from the cities of Syria and Mesopotamia, and systematically looting other cities including Antioch, whose population was deported to Persian territory.Greatrex–Lieu (2002), II, 102] Belisarius, recalled from the campaigns in the West to deal with the Persian threat, waged an inconclusive campaign against Nisibis in 541. Khosrau launched another offensive in Mesopotamia in 542 when he attempted to capture Sergiopolis. [Procopius, "Wars", II.20.17–19
* Greatrex–Lieu (2002), II, 109–110
] He soon withdrew in the face of an army under Belisarius, sacking the city of Callinicum en route. [Procopius, "Wars", II.21.30–32
* Greatrex–Lieu (2002), II, 110
] Attacks on a number of Roman cities were repulsed, and Persian forces were defeated at Dara. [Corripus, "Johannidos", I.68–98
* Greatrex–Lieu (2002), II, 111
] In 543, the Romans launched an offensive against Dvin but were defeated by a small Persian force at Anglon. Khosrau besieged Edessa in 544 without success and was eventually bought off by the defenders.Greatrex-Lieu (2002), II, 113] In the wake of the Persian retreat, Roman envoys proceeded to Ctesiphon for negotiations.Procopius, "Wars", 28.7–11
* Greatrex (2005), 489; Greatrex–Lieu (2002), II, 113] A five-year truce was agreed to in 545, secured by Roman payments to the Persians.Procopius, "Wars", 28.7–11
* Evans, [ Justinian (527–565 AD)] ; Greatrex–Lieu (2002), II, 113] Early in 548, King Gubazes of Lazica, having found Persian protection oppressive, asked Justinian to restore the Roman protectorate. The emperor seized the chance, and in 548–549 combined Roman and Lazic forces won a series of victories against Persian armies, although they failed to take the key garrison of Petra. The city was finally subjugated in 551, but in the same year a Persian offensive led by Mihr-Mihroe occupied eastern Lazica. [Treadgold (1997), 204–207] The truce that had been established in 545 was renewed outside Lazica for a further five years on condition that the Romans pay 2,000 lbs of gold each year. [Treadgold (1997), 209] In Lazica the war dragged on inconclusively for several years, with neither side able to make any major gains.Farrokh (2007), 236] Khosrau, who now had to deal with the White Huns, renewed the truce in 557, this time without excluding Lazica; negotiations continued for a definite peace treaty. [Greatrex (2005), 489; Treadgold (1997), 211] Finally, in 561, the envoys of Justinian and Khosrau put together a 50-year peace. The Persians agreed to evacuate Lazica and received an annual subsidy of 30,000 "nomismata" annually. [Menander Protector, "History", frag. 6.1. According to Greatrex (2005), 489, to many Romans this arrangement "appeared dangerous and indicative of weakness".] Both sides agreed not to build new fortifications near the frontier and to ease restrictions on diplomacy and trade.Evans, [ Justinian (527–565 AD)] ]

War for the Caucasus

War broke out again when Armenia and Iberia revolted against Sassanid rule in 571 AD, following clashes involving Roman and Persian proxies in Yemen and the Syrian desert, and Roman negotiations for an alliance with the Turks against Persia. [John of Epiphania, "History", [ 2] , gives an additional for the outbreak of the war: " [The Medians'] contentiousness increased even further [...] when Justin did not deem to pay the Medians the five hundred pounds of gold each year previously agreed to under the peace treaties and let the Roman State remain forever a tributary of the Persians." See also, Greatrex (2005), 503–504] Justin II brought Armenia under his protection, while Roman troops under Justin's nephew Marcian raided Arzanene and invaded Persian Mesopotamia, where they defeated local forces. [Treadgold (1997), 222] Marcian's sudden dismissal and the arrival of troops under Khosrau resulted in a ravaging of Syria, the failure of the Roman siege of Nisibis and the fall of Dara. [The great bastion of the Roman frontier was in Persian hands for the first time (Whitby [2000] , 92–94).] At a cost of 45,000 "solidi", a one-year truce in Mesopotamia (eventually extended to five years) [Greatrex–Lieu (2002), II, 152; Louth (2005), 113] was arranged, but in the Caucasus and on the desert frontiers the war continued. [Theophanes, "Chronicle", 246.11–27 * Whitby (2000), 92–94] In 576, Khosrau I attempted to combine aggression in Armenia with discussion of a permanent peace. He invaded Anatolia and sacked Sebasteia, but after a clash near Melitene the Persian army suffered heavy losses while fleeing across the Euphrates under Roman attack.Theophylact, "History", I, [ 9.4] (PDF) Treadgold (1997), 224; Whitby (2000), 95]

The Romans exploited Persian disarray by invading deep into Persian territory and raiding Atropatene. Khosrau sought peace, but abandoned this initiative after Tamkhusro won a victory in Armenia, where Roman actions had alienated local inhabitants.Treadgold (1997), 224; Whitby (2000), 95–96] In the spring of 578 the war in Mesopotamia resumed with Persian raids on Roman territory. The Roman general Maurice retaliated by raiding Persian Mesopotamia, capturing the stronghold of Aphumon, and sacking Singara. Khosrau again opened peace negotiations but he died early in 579 and his successor Hormizd IV preferred to continue the war. [Soward, [ Theophylact Simocatta and the Persians] (PDF); Treadgold (1997), 225; Whitby (2000), 96]

During the 580s, the war continued inconclusively with victories on both sides. In 582, Maurice won a battle at Constantia over Adarmahan and Tamkhusro, who was killed, but the Roman general did not follow up his victory; he had to hurry to Constantinople to pursue his imperial ambitions. [Soward, [ Theophylact Simocatta and the Persians] (PDF); Treadgold (1997), 226; Whitby (2000), 96]

The Persians captured Martyropolis through treachery in 589, but that year the stalemate was shattered when the Persian general Bahram Chobin, having been dismissed and humiliated by Hormizd IV, raised a rebellion. Hormizd was overthrown in a palace coup in 590 and replaced by his son Khosrau II, but Bahram pressed on with his revolt regardless and the defeated Khosrau was soon forced to flee for safety to Roman territory, while Bahram took the throne as Bahram VI. With support from Maurice, Khosrau raised a rebellion against Bahram, and in 591 the combined forces of his supporters and the Romans restored Khosrau II to power. In exchange for their help, Khosrau not only returned Dara and Martyropolis but also agreed to cede the western half of Iberia and more than half of Persian Armenia to the Romans. [Theophylact, V, "History", I, [ 3.11] (PDF) and [ 15.1] (PDF)
* Louth (2005), 115; Treadgold (1997), 231–232


In 602 the Roman army campaigning in the Balkans mutinied under the leadership of Phocas, who succeeded in seizing the throne, and then killed Maurice and his family. Khosrau II used the murder of his benefactor as a pretext for war. [Foss (1975), 722] In the early years of the war the Persians enjoyed overwhelming and unprecedented success. They were aided by Khosrau's use of a pretender claiming to be Maurice's son, and by the revolt against Phocas of the Roman general Narses. [Theophanes, "Chronicle", 290–293
* Greatrex–Lieu (2002), II, 183–184
] In 603 Khosrau defeated and killed the Roman general Germanus in Mesopotamia and laid siege to Dara. Despite the arrival of Roman reinforcements from Europe he won another victory in 604, while Dara fell after a nine-month siege. Over the following years the Persians gradually overcame the fortress cities of Mesopotamia by siege, one after another. [Theophanes, "Chronicle", 292–293 * Greatrex–Lieu (2002), II, 185–186] At the same time they won a string of victories in Armenia and systematically subdued the Roman garrisons in the Caucasus. [Greatrex–Lieu (2002), II, 186–187] Phocas was deposed in 610 by Heraclius, who sailed to Constantinople from Carthage. [Haldon (1997), 41; Speck (1984), 178.] Around the same time the Persians completed their conquest of Mesopotamia and the Caucasus, and in 611 they overran Syria and entered Anatolia, occupying Caesarea. [Greatrex–Lieu (2002), II, 188–189] Having expelled the Persians from Anatolia in 612, Heraclius launched a major counter-offensive in Syria in 613. He was decisively defeated outside Antioch by Shahrbaraz and Shahin and the Roman position collapsed. [Greatrex–Lieu (2002), II, 189–190] Over the following decade the Persians were able to conquer Palestine and Egypt, [Greatrex–Lieu (2002), II, 190–193, 196] and to devastate Anatolia. [The mint of Nicomedia ceased operating in 613, and Rhodes fell to the invaders in 622–623 (Greatrex-Lieu(2002), II, 193–197).] Meanwhile, the Avars and Slavs took advantage of the situation to overrun the Balkans, bringing the Roman Empire to the brink of destruction. [Howard-Johnston (2006), 85] During these years, Heraclius strove to rebuild his army, slashing non-military expenditures, devaluing the currency and melting down Church plate, with the backing of Patriarch Sergius, to raise the necessary funds to continue the war. [Greatrex–Lieu (2002), II, 196] In 622, Heraclius left Constantinople, entrusting the city to Sergius and general Bonus as regents of his son. He assembled his forces in Asia Minor and, after conducting exercises to revive their morale, he launched a new counter-offensive, which took on the character of a holy war. [Theophanes, "Chronicle", 303–304, 307 * Cameron (1979), 23; Grabar (1984), 37] In the Caucasus he inflicted a defeat on an army led by a Persian-allied Arab chief, and then won a victory over the Persians under Shahrbaraz. [Theophanes, "Chronicle", 304.25–306.7 * Greatrex–Lieu (2002), II, 199] Following a lull in 623, while Heraclius negotiated a truce with the Avars, he resumed his campaigns in the East in 624 and routed an army led by Khosrau at Ganzak in Atropatene. [Theophanes, "Chronicle", 306–308 * Greatrex–Lieu (2002), II, 199–202] In 625 he defeated the generals Shahrbaraz, Shahin and Shahraplakan in Armenia, and in a surprise attack that winter he stormed Shahrbaraz's headquarters and attacked his troops in their winter billets. [Theophanes, "Chronicle", 308–312 * Greatrex–Lieu (2002), II, 202–205] Supported by a Persian army commanded by Shahrbaraz, the Avars and Slavs unsuccessfully besieged Constantinople in 626, [Theophanes, "Chronicle", 316 * Cameron (1979), 5–6, 20–22] while a second Persian army under Shahin suffered another crushing defeat at the hands of Heraclius' brother Theodore. [Theophanes, "Chronicle", 315–316 * Farrokh–McBride (2005), 56] Meanwhile, Heraclius formed an alliance with the Turks, who took advantage of dwindling strength of the Persians to ravage their territories in the Caucasus. [Greatrex–Lieu (2002), II, 209–212] Late in 627, Heraclius launched a winter offensive into Mesopotamia, where, despite the desertion of the Turkish contingent that had accompanied him, he defeated the Persians at the Battle of Nineveh. Continuing south along the Tigris, he sacked Khosrau's great palace at Dastagird and was only prevented from attacking Ctesiphon by the destruction of the bridges on the Nahrawan Canal. Discredited by this series of disasters, Khosrau was overthrown and killed in a coup led by his son Kavadh II, who at once sued for peace, agreeing to withdraw from all occupied territories. [Theophanes, "Chronicle", 317–327
* Greatrex–Lieu (2002), II, 217–227
] Heraclius restored the True Cross to Jerusalem with a majestic ceremony in 629. [Haldon (1997), 46; Baynes (1912), "passim"; Speck (1984), 178]


The devastating impact of this last war, added to the cumulative effects of a century of almost continuous conflict, left both empires crippled. When Kavadh II died only months after coming to the throne, Persia was plunged into several years of dynastic turmoil and civil war. The Sassanids were further weakened by economic decline, heavy taxation from Khosrau II's campaigns, religious unrest, and the increasing power of the provincial landholders. [Howard-Johnston (2006), 9: " [Heraclius'] victories in the field over the following years and its political repercussions [...] saved the main bastion of Christianity in the Near East and gravely weakened its old Zoroastrian rival."] The Roman Empire was also severely affected, with its financial reserves exhausted by the war, and the Balkans now largely in the hands of the Slavs. [Haldon (1997), 43–45, 66, 71, 114–15] Additionally, Anatolia was devastated by repeated Persian invasions; the empire's hold on its recently regained territories in the Caucasus, Syria, Mesopotamia, Palestine and Egypt was loosened by many years of Persian occupation. [Ambivalence toward Byzantine rule on the part of monophysites may have lessened local resistance to the Arab expansion (Haldon [1997] , 49–50).] Neither empire was given any chance to recover, as within a few years they were struck by the onslaught of the Arabs (newly united by Islam), which, according to Howard-Johnston, "can only be likened to a human tsunami". [Foss (1975), 746–47; Howard-Johnston (2006), xv] According to George Liska, the "unnecessarily prolonged Byzantine–Persian conflict opened the way for Islam". [Liska (1998), 170] The Sassanid Empire rapidly succumbed to these attacks and was completely destroyed. During the Byzantine–Arab Wars, the exhausted Roman Empire's recently regained southern provinces of Syria, Egypt and North Africa were also lost, reducing the empire to a territorial rump consisting of Anatolia and a scatter of islands and footholds in the Balkans and Italy. [Haldon (1997), 49–50] These remaining lands were thoroughly impoverished by frequent attacks, marking the transition from classical urban civilization to a more rural, medieval form of society. However, unlike Persia, the Roman Empire (in the form of the Byzantine Empire) ultimately survived the Arab assault, holding onto its residual territories and decisively repulsing two Arab sieges of its capital in 674–678 and 717–718. [Haldon (1997), 61–62; Howard-Johnston (2006), 9]

trategies and military tactics

When the Roman and Parthian Empires first collided, it appeared that Parthia had the potential to push its frontier to the Aegean and the Mediterranean. However, under Pacorus and Labienus, the Romans repulsed the great invasion of Syria and were gradually able to take advantage of the weaknesses of the Parthian military system, which, according to George Rawlinson, was adapted for national defense but ill-suited for conquest. The Romans, on the other hand, were continually modifying and evolving their "grand strategy" from Trajan's time onwards, and were by the time of Pacorus able to take the offensive against the Parthians. [Rawlinson (2007), 199: "The Parthian military system had not the elasticity of the Romans [...] However loose and seemingly flexible, it was rigid in its uniformity; it never altered; it remained under the thirtieth Arsaces such as it had been under the first, improved in details perhaps, but essentially the same system." According to Michael Whitby (2000), 310, "the eastern armies preserved the Roman military reputation through to the end of the sixth century by capitalizing on available resources and showing a capacity to adapt to a variety of challenges".] Like the Sassanids in the late third and fourth centuries, the Parthians generally avoided any sustained defense of Mesopotamia against the Romans. However, the Iranian plateau never fell, as the Roman expeditions had always exhausted their offensive impetus by the time they reached lower Mesopotamia, and their extended line of communications through territory not sufficiently pacified exposed them to revolts and counterattacks. [Wheeler (2007), 259]

From the fourth century AD onwards, the Persian Sassanids grew in strength and adopted the role of aggressor. They considered much of the land added to the Roman empire in Parthian and early Sassanid times to rightfully belong to the Iranian sphere.Frye (2005), 473] Everett Wheeler argues that "the Sassanids, administratively more centralized than the Parthians, formally organized defense of their territory, although they lacked a standing army until Khosrau I". [Wheeler (2007), 259] In general the Romans regarded the Sassanids as a more serious threat than the Parthians, while the Sassanids regarded the Roman Empire as the enemy "par excellence." [Greatrex (2005), 478; Frye (2005), 472]

Militarily, the Sassanids continued the Parthians' heavy dependence on the combination of light-horse archers and cataphracts, the heavy armored cavalry provided by the aristocracy. They added a contingent of war elephants obtained from India, but their infantry quality was inferior to that of the average Roman legion. [Cornuelle, [ An Overview of the Sassanian Persian Military] ; Sidnell (2006), 273] The Persian heavy cavalry inflicted several defeats on the Roman foot-soldiers, including those led by Crassus in 53 BC, [According to Reno E. Gabba, the Roman army was reorganized over time after the impact of the Battle of Carrhae (Gabba [1966] , 51–73).] Mark Antony in 36 BC, and Valerian in 260 AD. The need to counter this threat led to the introduction of "cataphractarii" into the Roman army; [Vegetius, III, "Epitoma Rei Militaris", [ 26] * Verbruggen–Willard–Southern (1997), 4–5] as a result, heavily armed cavalry grew in importance in both the Roman and Persian armies after the third century AD, and until the end of the wars. The Romans had achieved and maintained a high degree of sophistication in siege warfare, and had developed a range of siege machines. On the other hand, the Parthians were inept at besieging; their cavalry armies were more suited to the hit-and-run tactics that destroyed Antony's siege train in 36 BC. The situation changed with the rise of the Sassanids, when Rome encountered an enemy equally skilled in siegecraft, who made use of artillery, machines captured from the Romans, embankments, and siege towers. [Campbell–Hook (2005), 57–59; Gabba (1966), 51–73]

Towards the end of the first century AD, Rome organized the protection of its eastern frontiers through a line of fortifications, the "limes" system, which lasted till the Muslim conquests of the seventh century after improvements by Diocletian. [Shahîd (1984), 24–25; Wagstaff (1985), 123–125] Like the Romans, the Sassanids constructed defensive walls opposite the territory of their opponents. According to R. N. Frye, it was under Shapur II that the Persian system was extended, probably in imitation of Diocletian's construction of the "limes" of the Syrian and Mesopotamian frontiers of the Roman empire. The Roman border units were known as "limitanei", and they faced the Lakhmids in Iraq, who frequently aided the Persians in their contests with the Romans. Shapur intended a permanent defense force against other Arabs of the desert, especially those allied with Rome. Shapur also built a line of fortifications in the west on the model of the Roman system of "limes", which impressed the Sassanids. [Frye (1993), 139; Levi (1994), 192]

By the beginning of Sassanid rule, a number of buffer states existed between the empires. These were absorbed by the central state over time, and by the seventh century the last buffer state, the Arab Lakhmids of Al-Hirah, was annexed to the Sassanid Empire. Frye notes that in the third century AD such client states played an important role in Roman–Sassanid relations, but both empires gradually replaced them by an organized defense system run by the central government, and based on the "limes" and the fortified frontier cities, such as Dara.Frye (1993), 139] Recent studies and assessments have reaffirmed the superior siegecraft and military engineering and organization of the Sassanids over the Parthians. [ [ Excavations In Iran Unravel Mystery Of "Red Snake"] , Science Daily; Levi (1994), 192] According to the conclusions of a recent researcher: [Rekavandi–Sauer–Wilkinson–Nokandeh, [ The Enigma of the Red Snake] ]


The Roman–Persian Wars have been characterized as "futile" and both too "depressing and tedious to contemplate". [Brazier (2001), 42] Prophetically, Cassius Dio noted their "never-ending cycle of armed confrontations" and observed that "it is shown by the facts themselves that [Severus'] conquest has been a source of constant wars and great expense to us. For it yields very little and uses up vast sums; and now that we have reached out to peoples who are neighbor of the Medes and the Parthians rather than of ourselves, we are always, one might say, fighting the battles of those peoples." [Cassius Dio, "Roman History", LXXV, 3. [*.html 2–3] * Garnsey–Saller (1987), 8] In the long series of wars between the two powers, the frontier in upper Mesopotamia remained more or less constant. Historians point out that the stability of the frontier over the centuries is remarkable, although Nisibis, Singara, Dara and other cities of upper Mesopotamia changed hands from time to time, and the possession of these frontier cities gave one empire a trade advantage over the other. As Frye states:

Both sides attempted to justify their respective military goals in both active and reactive ways. The Roman quest for world domination was accompanied by a sense of mission and pride in Western civilization, and by ambitions to become a guarantor of peace and order. Roman sources reveal long-standing prejudices with regard to the Eastern powers' customs, religious structures, languages and forms of government. John F. Haldon underscores that "although the conflicts between Persia and East Rome revolved around issues of strategic control around the eastern frontier, yet there was always a religious-ideological element present". From the time of Constantine on, Roman emperors appointed themselves as the protectors of Christians of Persia. [Barnes (1985), 126] This attitude created intense suspicions of the loyalties of Christians living in Sassanid Iran, and often led to Roman–Persian tensions or even military confrontations. [Sozomen, "Ecclesiastical History", II, [ 15] * McDonough (2006), 73] A characteristic of the final phase of the conflict, when what had began in 611–612 as a war of raid was soon to be transformed into a war of conquest, was the pre-eminence of the Cross as a symbol of imperial victory, and of the strongly religious element in the Eastern Roman imperial propaganda; Heraclius himself cast Khosrau as the enemy of God, and authors of the sixth and seventh centuries were fiercely hostile to Persia. [Haldon (1999), 20; Isaak (1998), 441] This tradition of a "pro-Roman"historical scholarship prevailed for centuries, and it was not until recently that scholars adopted a broader approach, and attempted to illuminate the lesser-known Persian position. [Dignas–Winter (2007), [ 1–3] (PDF)]


The sources for the history of Parthia and the wars with Rome are scant and scattered. The Parthians followed the Achaemenid tradition and favored oral historiography that assured the corruption of their history once they had been vanquished. The main sources of this period are thus Roman (Tacitus, Marius Maximus, and Justin) and Greek historians (Herodian, Cassius Dio and Plutarch). The 13th book of the Sibylline Oracles narrates the effects of the Roman–Persian Wars in Syria from the reign of Gordian III to the domination of the province by Odaenathus of Palmyra. With the end of Herodian's record we lose all contemporary chronological narratives of Roman history, until the narratives of Lactantius and Eusebius at the beginning of the fourth century, both from a Christian perspective. [Dodgeon–Greatrex–Lieu (2002), I, 5; Potter (2004), 232–233]

The principal sources for the early Sassanid period are not contemporary. Among them the most important are the Greeks Agathias and Malalas, the Persians Tabari and Ferdowsi, the Armenian Agathangelos, and the Syriac Chronicles of Edessa and Arbela, most of whom depended on late Sassanid sources, especially Khoday Namag. The Augustan History is neither contemporary nor reliable, but it is the chief narrative source we have for Severus and Carus. The trilingual (Greek, Parthian, and Middle Persian) inscriptions of Shapur are prime sources, albeit solely expressing the Persian point of view. [Frye (2005), 461–463; Shahbazi, [ Historiography] ] These were isolated attempts at approaching written historiography however, and by the end of the fourth century AD, even the practice of carving rock reliefs and leaving short inscriptions was abandoned by the Sassanids.Shahbazi, [ Historiography] ]

For the period between 353 and 378, there is an eyewitness source to the main events on the eastern frontier in the "Res Gestae" of Ammianus Marcellinus. For the events covering the period between the fourth and the sixth century, the works of Sozomenus, Zosimus, Priscus, and Zonaras are especially valuable. [Dodgeon–Greatrex–Lieu (2002), I, 7] Theophylact Simocatta is the main source for the reign of Maurice, [Boyd (1999), 160] while Theophanes, Chronicon Paschale and the poems of George of Pisidia are useful sources for the last Roman–Persian war. In addition to Byzantine sources, two Armenian historians, Sebeos and Movses, contribute to the coherent narrative of Heraclius' war and are regarded by Howard-Johnston as "the most important of extant non-Muslim sources". [Howard-Johnston (2006), 42–43]

ee also

* Roman relations with the Parthians and Sassanids

Citations and notes


Primary sources

*Agathias, "Histories". Book 4.
*Aurelius Victor, "Liber de Caesaribus". See original text in the [ Latin Library] .
*Cassius Dio, "Roman History". Book LXXX. Translated by [ Earnest Cary] .
*"Chronicon Paschale". See the original text in [ Google Book] .
*Corippus, " [,M1 Johannis] ". Book I.
*Eutropius, "Abridgment of Roman History". Book IX. Translated by [ the Rev. John Selby Watson] .
*Herodian, "History of the Roman Empire". Book VI. Translated by [ Edward C. Echols]
*John of Epiphania. " [ History] ".
*Joshua the Stylite, "Chronicle". Translated by [ William Wright] .
*Justin, "Historiarum Philippicarum". Book XLI. See original text in the [ Latin Library] .
*Lactantius, "De Mortibus Persecutorum". See original text in the [ Latin Library] .
*Procopius, "History of the Wars", Book II. Translated by [ H. B. Dewing] .
*"Sibylline Oracles". Book XIII. Translated by [ Milton S. Terry] .
*Sozomen, "Ecclesiastical History", Book II. Translated by [ Chester D. Hartranft, Philip Schaff and Henry Wace] .
*". Translation based on Alfred John Church and William Jackson Brodribb.
*Theophanes the Confessor. "Chronicle". See original text in [,_Theophanes_Abbas_Confessor,_Chronographia_(CSHB_Classeni_Recensio),_GR.pdf Documenta Catholica Omnia] (PDF).
*Theophylact Simocatta. "History". Books I and V. Translated by [ Michael and Mary Whitby] (PDF).
*Vegetius. "Epitoma Rei Militaris". Book III. See original text in the [ Latin Library] .
*Zacharias Rhetor. "Historia Ecclesiastica".

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*cite book |title=Ancient Rome: A Military and Political History|last=Mackay |first=Christopher S.|isbn=0-521-80918-5|year=2004|publisher=Cambridge University Press|url=,+Ancient+Rome&ei=kWB6SIvwM4XUjgGUlNDJCA|chapter=Ceasar and the End of Republican Government
*cite book |title=Violence in Late Antiquity: Perceptions and Practices|last=McDonough|first=S. J.|year=2006|editor= Drake, Harold Allen|url=,+Rome+and+Persia+at+War&source=gbs_summary_s&cad=0|publisher=Ashgate Publishing, Ltd.|isbn=0-754-65498-2|chapter=Persecutions in the Sasanian Empire
*cite book |title=The Roman Empire at Bay: Ad 180–395|last=Potter|first=David Stone|year=2004|url=,+Persian,+historiography&source=gbs_summary_s&cad=0|publisher=Routledge|isbn=0-4151-0057-7|chapter=The Failure of the Severan Empire
*cite book |title=Parthia|last=Rawlinson|first=George|year=2007|origyear=1893 |publisher=Cosimo, Inc.|isbn=1-602-06136-X|url=,+Parthia&source=gbs_summary_s&cad=0
*cite web |url= |title=The Enigma of the Red Snake |accessdate=2008-05-27 |last=Rekavandi |first=Hamrid Omrani |coauthors=Sauer, Eberhard; Wilkinson, Tony; Nokandeh, Jebrael |work=World Archaeology |publisher=current
*cite encyclopedia |year=1996–2007 |title =Historiography – Pre-Islamic Period |encyclopedia= Encyclopaedia Iranica|editor= Yarshater, Ehsan |last=Shahbazi|first=A. SH.|url=
*cite book |title=Rome and the Arabs|last=Shahîd|first=Irfan|year=1984|publisher=Dumbarton Oaks|isbn=0-884-02115-7|url=,+Persia,+Rome&lr=&source=gbs_summary_s&cad=0|chapter=Arab-Roman Relations
*cite book |title=The Cambridge Ancient History (IX, The Last Age of the Roman Republic) |last=Sherwin-White|first=A. N. |authorlink=A. N. Sherwin-White|editor=Crook, John Anthony; Rawson, Elizabeth |year=1994 |publisher=Cambridge University Press|isbn=0-521-25603-8 |url=,+Armenia,+Parthian&lr=&source=gbs_summary_s&cad=0|chapter=Lucullus, Pompey and the East
*cite book|last=Sicker|first=Martin|title=The Pre-Islamic Middle East|publisher=Greenwood Publishing Group|year=2000|isbn=0-275-96890-1|chapter=The Struggle over the Euphrates Frontier
*cite book|last=Sidnell|first=Philip|title=Warhorse, Cavalry in the Ancient World|publisher=Continuum International Publishing Group|year=2006|isbn=1-852-85374-3|url=,+Sassanid,+Roman&lr=&source=gbs_summary_s&cad=0|chapter=Imperial Rome
*cite book |title=The Roman Empire from Severus to Constantine|last=Southern |first=Pat|year=2001 |publisher=Routledge |isbn=0-415-239435|url=,+Ardashir&source=gbs_summary_s&cad=0|chapter=Beyond the Eastern Frontiers
*cite web|title=Theophylact Simocatta and the Persians|last=Soward|first=Warren|coauthors= Whitby, Michael; Whitby, Mary |url=|format=PDF|publisher=Sasanika|accessdate=2008-04-27
*cite book|last=Speck|first=Paul|title=Varia 1 (Poikila Byzantina 4)|year=1984|publisher=Rudolf Halbelt|chapter=Ikonoklasmus und die Anfänge der Makedonischen Renaissance|pages=175–210
*cite book|last=Treadgold|first=Warren|title=A History of the Byzantine State and Society|publisher=Stanford University Press|year=1997|isbn=0-804-72630-2
*cite book |title=The Art of Warfare in Western Europe During the Middle Ages|last=Verbruggen|first=J. F.|coauthors=Willard, Sumner; Southern, R. W.|year=1997|publisher=Boydell & Brewer|isbn=0-851-15570-7|url=,+Sassanid,+Parthian,+equipment&lr=&source=gbs_summary_s&cad=0|chapter=Historiographical Problems
*cite book |title=The Evolution of Middle Eastern Landscapes: An Outline to A.D. 1840|last=Wagstaff|first=John|year=1985|publisher=Rowman & Littlefield|isbn=0-389-20577-X|url=,+Rome,+Parthian,+Sasanian&source=gbs_summary_s&cad=0|chapter=Hellenistic West and Persian East
*cite book |title=A Companion to the Roman Army|last=Wheeler|first=Everett|editor=Erdkamp, Paul |year=2007|publisher=Blackwell Publishing|isbn=1-405-12153-X|url=,+assessment&source=gbs_summary_s&cad=0|chapter=The Army and the Limes in the East
*cite book |title=The Cambridge Ancient History (volume XIV)|last=Whitby|first=Michael|editor=Cameron, Averil; Ward-Perkins, Bryan; Whitby, Michael |year=2000|publisher=Cambridge University Press|isbn=0-521-32591-9|url=,+Nisibis&source=gbs_summary_s&cad=0|chapter=The Army, c. 420–602
*cite book |title=The Cambridge Ancient History (volume XIV)|last=Whitby|first=Michael|editor=Cameron, Averil; Ward-Perkins, Bryan; Whitby, Michael |year=2000|publisher=Cambridge University Press|isbn=0-521-32591-9|url=,+Nisibis&source=gbs_summary_s&cad=0|chapter=The Successors of Justinian
*cite book |title=The Rome that Did Not Fall: The Survival of the East in the Fifth Century|last=Williams|first=Stephen|coauthors=Friell, Gerald|year=1999|publisher=Routledge|isbn=0-415-15403-0|url=,+importance+to+Rome,+trade&as_brr=3&source=gbs_summary_s&cad=0|chapter=Imperial Wealth and Expenditure

Further reading

*cite book |title=East Roman Foreign Policy. Formation and Conduct from Diocletian to Anastasius (ARCA 30)|last=Blockley |first=Roger C.|year=1992|publisher=Francis Cairns|location=Leeds|isbn=0-905-20583-9
*cite book |title=Prokop und die Perser. Untersuchungen zu den Römisch-Sasanidischen Kontakten in der ausgehenden Spätantike|last=Börm|first=Henning|year=2007|publisher=Franz Steiner |location=Stuttgart|isbn=9-783-515-09052-0
*cite journal |last=Börm |first=Henning |authorlink= |coauthors= |year=2008 |month= |title="Es war allerdings nicht so, dass sie es im Sinne eines Tributes erhielten, wie viele meinten..." Anlässe und Funktion der persischen Geldforderungen an die Römer|journal=Historia |volume=57 |issue= |pages=327–346 |id= |url= |accessdate=2008-08-30 |language=German
*cite book |title=Rome and Persia at War, 502–532|last=Greatrex|first=Geoffrey B.|year=1998|publisher=Francis Cairns|location=Rome|isbn=0-905-20593-6|url=,+Rome+and+Persia+at+War&ei=a79LSIPfH5PSjgHukZXmDQ
*cite book |editor=Cameron, Averil; Garnsey, Peter |last=Isaac|first=Benjamin|year=1998|publisher=Cambridge University Press|title=The Cambridge Ancient History: The Late Empire, A.D. 337–425 XIII|isbn=0-521-30200-5|url=,+Rome,+Persia&as_brr=3&source=gbs_summary_s&cad=0|chapter=The Eastern Frontier
*cite book |title=Heraclius, Emperor of Byzantium|last=Kaegi|first=Walter E.|year=2003|publisher=Cambridge University Press|isbn=0-521-81459-6|url=,+Heraclius&source=gbs_summary_s&cad=0
* cite book | last =Kettenhofen | first = Erich | year = 1982 | title =Die Römisch-persischen Kriege des 3. Jahrhunderts. n. Chr. Nach der Inschrift Sāhpuhrs I. an der Ka’be-ye Zartošt (ŠKZ). Beihefte zum Tübinger Atlas des Vorderen Orients B 55 | location=Wiesbaden
* cite book | last =Millar | first = Fergus | year = 1982 | url=|title =The Roman Near East, 31 B.C.-A.D. 337 | publisher=Harvard University Press|location=Cambridge
*cite book |title=A History of the Later Roman Empire, AD 284–641|last=Mitchell|first=Stephen B.|year=2006|publisher=Blackwell Publishing|isbn=1-405-10857-6
*cite book |title=The Roman Empire at Bay: Ad 180–395|last=Potter|first=David S.|year=2004|publisher=Routledge|location=London und New York|isbn=0-415-10058-5|url=,+The+Roman+Empire+at+Bay&source=gbs_summary_s&cad=0
*cite book |title=The Emperor Maurice and his Historian|last=Whitby|first=Michael|year=1988|publisher=Oxford University Press|isbn=0-198-22945-3|url=,+The+Emperor+Maurice+and+his+Historian&source=gbs_summary_s&cad=0

External links

*cite web|title=Sixth Century Alania: between Byzantium, Sasanian Iran and the Turkic World|last=Alemani|first=Agustí|url=|format=PDF|publisher=Transoxiana Webfestschrift Series I|work=Ēran ud Anērān|accessdate=2008-05-06
*cite web|title=Rome and Parthia at War|url=|publisher=All Empires - Online History Community|work=History Articles - Classical Europe and Mediterranean |accessdate=2008-05-16
*cite web|title=Sassanids vs Byzantines|url=|publisher=All Empires - Online History Community|work=History Articles - Medieval Europe|accessdate=2008-05-16

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