Hundred Years' War (1415–53)
The Lancastrian War was the third and final phase of the Anglo-French Hundred Years' War. It lasted from 1415, when King Henry V of England invaded Normandy, to 1453, when the English lost Bordeaux. It followed a long period of peace from the end of the Caroline War in 1389. The phase was named after the House of Lancaster, the ruling house of the Kingdom of England, to which Henry V belonged.
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.