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 1366 there was a civil war of succession in Castile (part of modern Spain). The forces of the ruler Peter of Castile were pitched against those of his half-brother Henry of Trastámara. The English crown supported Peter; the French supported Henry. French forces were led by Bertrand du Guesclin, a Breton, who rose from relatively humble beginnings to prominence as one of France's war leaders. Charles V provided a force of 12,000, with du Guesclin at their head, to support Trastámara in his invasion of Castile.