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
In 1341, conflict over the succession to the Duchy of Brittany began the War of the Breton Succession, in which Edward backed John of Montfort and Philip backed Charles of Blois. Action for the next few years focused around a back and forth struggle in Brittany. The city of Vannes in Brittany changed hands several times, while further campaigns in Gascony met with mixed success for both sides. The English backed Montfort finally succeeded in taking the duchy but not until 1364.