entanglements
81Battle of Passchendaele — For other uses, see Passchendaele (disambiguation). Battle of Passchendaele Third Battle of Ypres Part of the Western Front of the First World War …
82Submarine communications cable — A cross section of a submarine communications cable. 1 Polyethylene 2 Mylar tape 3 Stranded steel wires 4 Aluminium water barrier 5 Polycarbonate 6 Copper or aluminium tube 7 Petroleum jelly 8 Optical fib …
83Pax Americana — (Latin: American Peace ) describes a period of relative peace in the Western world since the end of World War II in 1945, coinciding with the dominant military and economic position of the United States. The term was modelled on the Pax Romana of …
84Crimean War — For other uses, see Crimean War (disambiguation). Crimean War Part of Ottoman wars in Europe Detail of …
85Convection — This figure shows a calculation for thermal convection in the Earth s mantle. Colors closer to red are hot areas and colors closer to blue are cold areas. A hot, less dense lower boundary layer sends plumes of hot material upwards, and likewise,… …
86Western Front (World War I) — Infobox Military Conflict conflict=Western Front partof=World War I caption=For most of World War I, Allied and German Forces were stalled in trench warfare along the Western Front. place=Belgium and northeastern France date=1914 ndash; 1918… …
87Timeline of United States diplomatic history — History of the United States This article is part of a series Timeline …
88Paratrooper — Paratroopers are soldiers trained in parachuting and generally operate as part of an airborne force. Paratroopers are used for tactical advantage as they can be inserted into the battlefield from the air, thereby allowing them to be positioned in …
89Density matrix — Mixed state redirects here. For the psychiatric condition, see Mixed state (psychiatry). In quantum mechanics, a density matrix is a self adjoint (or Hermitian) positive semidefinite matrix (possibly infinite dimensional) of trace one, that… …
90Battle of Nanking — Part of the Second Sino Japanese War …
