Hundred Years' War
Historians commonly divide the war into three phases separated by truces: the Edwardian War (1337–1360), the Caroline War (1369–1389), and the Lancastrian War (1415–1453). Local conflicts in neighbouring areas, which were contemporarily related to the war, including the War of the Breton Succession (1341–1365), the Castilian Civil War (1366–1369), the War of the Two Peters (1356–1369) in Aragon, and the 1383–85 crisis in Portugal, were availed by the parties to advance their agendas. Later historians adopted the term "Hundred Years' War" as a historiographical periodisation to encompass all of these events, thus constructing the longest military conflict in European history.
Hundred Years' War
Several overwhelming English victories in the war—especially at Crécy, Poitiers, and Agincourt—raised the prospects of an ultimate English triumph, and convinced the English to continue pouring money and manpower into the war over many decades. However, the greater resources of the French monarchy prevented the English kings from ever completing the conquest of France. Starting in 1429, decisive French victories at Orléans, Patay, Formigny, and Castillon concluded the war in favour of the House of Valois, with England permanently losing most of its possessions on the continent.