- War of the Succession of Flanders and Hainault
The War of the Succession of Flanders and Hainault was a series of
feudal conflicts in the mid-thirteenth century between the children ofMargaret II, Countess of Flanders . They concerned the succession to the two counties, the first a fief of theKing of France and the latter of theKing of Germany .Origins
When Baldwin IX,
Count of Flanders and Hainault, left on theFourth Crusade in1202 , he left his western domains under his eldest daughter Joanna. Joanna inherited the counties on Baldwin's death and, despite two marriages, died without heirs in1244 . She was succeeded by her younger sister, the aforementioned Margaret.Margaret's first marriage, to
Bouchard of Avesnes , was broken in1221 per orders from Joanna and the excommunication of Bouchard. By Bouchard, however, she had already had three children, includingJohn I of Avesnes . Nevertheless in1223 , Margaret remarried withWilliam II of Dampierre (d.1231 ), who likewise gave three offspring, including William III and Guy.The rights to Margaret's inheritance between the sons of Avesnes and those of Dampierre were the cause of the conflicts known as the "war of the succession of Flanders and Hainault."
First conflict
The first conflict opened with Margaret's succession in 1244. John of Avesnes and William of Dampierre, half brothers, fought between themselves until King Louis IX intervened in
1246 . Louis gave Hainault (technically not his to give) to John and Flanders (indeed his vassal) to William. Margaret, in light of this judgement, gave the government of Flanders over to William in1247 . She did not however relinquish her governance of Hainault.In
1251 , William died and Flanders passed to Guy.econd conflict
In
1248 , Louis had left on theSeventh Crusade and remained abroad for six years. John quickly apprehended that his mother did not intend to give him the government of Hainault as she had that of Flanders to her other sons. John revolted against his mother and attacked his brother Guy, recently become count of Flanders.The war continued with John convincing the German anti-king William of Holland, to seize Hainault and Flemish territory within the empire. The fighting continued until the
Battle of West-Capelle of4 July 1253 , where John gained a brilliant victory over Guy and forced him and his mother to respect the division of Louis and grant him Hainault.Third conflict
Margaret did not rest in her defeat and did not recognise herself as overcome. She instead granted Hainault to
Charles of Anjou , the brother of King Louis, who had recently returned from the crusade. Charles took up her cause and warred with John of Avesnes, but failed to takeValenciennes and just missed being killed in a skirmish. When Louis returned in1254 , he reaffirmed his earlier arbitration and ordered his brother to get out of the conflict. Charles returned toProvence . With this second arbitration of the holy king, the conflict closed and John of Avesnes was secure in Hainault.
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