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
The Battle of Crécy was a complete disaster for the French, largely credited to the longbowmen and the French king, who allowed his army to attack before it was ready. Philip appealed to his Scottish allies to help with a diversionary attack on England. King David II of Scotland responded by invading northern England, but his army was defeated and he was captured at the Battle of Neville's Cross, on 17 October 1346. This greatly reduced the threat from Scotland. In France, Edward proceeded north unopposed and besieged the city of Calais on the English Channel, capturing it in 1347. This became an important strategic asset for the English, allowing them to safely keep troops in northern France. Calais would remain under English control, even after the end of the Hundred Years' War, until the successful French siege in 1558.