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.
Diversionary foreign policy
In 1415, King Henry V of England invaded France shortly after his succession to the throne, resulting in a short campaign and a resounding victory at the Battle of Agincourt. This campaign initiated the third phase of the Hundred Years' War, termed the Lancastrian War ("see" Hundred Years' War (1415–53)).