This is a political history of Brittany between 1158 and 1203, when it was ruled by the Angevin king of England, Henry II, and his successors. The book examines the process whereby Henry II gained sovereignty over Brittany, and how it was governed thereafter. This is the first study of this subject, offering an important contribution to the historiography of both Brittany and the "Angevin empire". It also offers a corrective to previous scholarship by suggesting that the Angevin regime in Brittany was neither alien nor opppressive to the Bretons.