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.
Peasants' Revolt
Another factor in the revolt of 1381 was the conduct of the war with France. In 1337 Edward III of England had pressed his claims to the French throne, beginning a long-running conflict that became known as the Hundred Years' War. Edward had initial successes, but his campaigns were not decisive. Charles V of France became more active in the conflict after 1369, taking advantage of his country's greater economic strength to commence cross-Channel raids on England. By the 1370s, England's armies on the continent were under huge military and financial pressure; the garrisons in Calais and Brest alone, for example, were costing £36,000 a year to maintain, while military expeditions could consume £50,000 in only six months. Edward died in 1377, leaving the throne to his grandson, Richard II, then only ten years old.