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.
Capetian–Plantagenet rivalry
Ironically, Edward III, the son of Isabella and Edward II of England would use his position as grandson of Philip the Fair to claim the Kingdom of France. Therefore, the marriage settlement that sealed the end of the "first" Hundred Years' War would lead to the casus belli employed to declare the "second" Hundred Years' War. The War of Saint-Sardos, the first major conflict between the two major kingdoms in half a century, would act as foreshadowing for the bigger war to come.