Battle of Crécy

The Battle of Crécy, from a 15th-century illuminated manuscript of Jean Froissart's Chronicles
"The Battle of Crécy (known in some older English sources as 'Cressy') took place on 26 August 1346 in north-east France between a French army commanded by King Philip VI and an English army led by King Edward III. The French attacked the English while they were traversing northern France during the Hundred Years' War resulting in an English victory and heavy loss of life among the French. ... The English then laid siege to the port of Calais. The battle crippled the French army's ability to relieve the siege; the town fell to the English the following year and remained under English rule for more than two centuries, until 1558. Crécy established the effectiveness of the longbow as a dominant weapon on the Western European battlefield. ..."
Wikipedia
YouTube: Hundred Years' War: Battle of Crecy 1346

Map of the route of Edward III's chevauchée of 1346