Philip II spent an important part of his reign fighting the so-called Angevin Empire, which was probably the greatest threat to the King of France since the rise of the Capetian dynasty. During the first part of his reign Philip II tried using Henry II of England's son against him. He allied himself with the Duke of Aquitaine and son of Henry II – Richard Lionheart – and together they launched a decisive attack on Henry's castle and home of Chinon and removed him from power.