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 (1369–89)
In 1378 Charles V's support for the election of the Avignon Pope Clement VII started the Great Schism. This event split the Church for almost four decades and thwarted papal efforts to prevent or end the Hundred Years' War. The disputed papal succession resulted in several lines of popes competing for the support of national rulers, which exacerbated the political divisions of the war. Despite papal involvement in peace conferences throughout the 14th century, no settlement was ever reached, in part because the papacy was not influential enough to impose one.