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 (1337–1360)
English defences in Gascony had been severely strained for some time, relief came when two of the nobles who supported the French king pursued a family feud against each other rather than fighting the English. The two nobles involved were the Count of Armagnac and the Count of Foix. Also, further assistance was provided by the Albret family, with Bernard-Aiz, Lord of Albret declaring for Edward in 1339. The Albrets held one of the most important lordships in English Gascony and had been courted by both the English and French crowns. Albret financed Edward's campaign in Gascony and also with his family connections was able to find much needed additional manpower for Edward's army.