Chivalry and Betrayal: The Hundred Years' War to confirm his legitimacy resumed the war with France now led by a king who was insane. In 1415 he landed at Harfleur which fell after a long siege weakening the English army. Against advice Henry led his army on a chevauchée to English held Calais but was intercepted by a far larger French army at Agincourt and at the ensuing battle Henry's archers killed the cream of French nobility. At Agincourt Henry V, the son of a usurper, had proved his right to be King and he was determined to regain Normandy and recreate the Duchy and landed in
Battle of Crécy or wounded, though it should be noted this number is not substantively reinforced by academics. The battle crippled the French army's ability to come to the aid of Calais, which was besieged by Edward's army the following month. Calais fell after a year-long siege and would become an exclave of England, remaining under English rule until 1558. In subsequent engagements, French men-at-arms would dismount to assail English longbowmen rather than stay mounted, as was advised to John II at Poitiers. The majority of the French soldiery at Agincourt also fought dismounted. Despite this, the French suffered similarly catastrophic defeats at