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 Agincourt an army about three times the size of their own fighting force". It is open to debate whether these should all be counted as non-combatants; Rogers (for example) accepts that the French probably had about 10,000 men-at-arms, but explicitly includes one "gros valet" (an armed, armoured and mounted military servant) per French man-at-arms in his calculation of the odds. Soon after the English victory at Agincourt, a number of popular folk songs were created about the battle, the most famous being the "Agincourt Carol", produced in the first half of the 15th century. Other ballads followed, including "King Henry Fifth's