ブーヴィーヌの戦い
Baldwin succeeded his father Arnoul II in 1220, aged 22. He quarrelled with his mother Beatrix, who died 1224 at Bourbourg. He was attacked by Ferdinand, Count of Flanders on his release from prison, where he had been for twelve years confined to the Louvre, since 1214 and the Battle of Bouvines where he had opposed Philip II.