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.
Charles VI of France
Charles VI's reign was marked by the continuing conflict with the English, known as the Hundred Years' War. An early attempt at peace occurred in 1396 when Charles' daughter, the almost seven-year-old Isabella of Valois, married the 29-year-old Richard II of England. By 1415, however, the feud between the French royal family and the House of Burgundy led to chaos and anarchy throughout France that Henry V of England was eager to take advantage of. Henry led an invasion that culminated in the defeat of the French army at the Battle of Agincourt in October.