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 1,500 men-at-arms and 7,000 longbowmen) across a part of the defile. The army was organised into three "battles" or divisions: the vanguard, led by the Duke of York; the main battle led by Henry himself; and the rearguard, led by Lord Camoys. In addition, Sir Thomas Erpingham, one of Henry's most experienced household knights, had a role in marshalling the archers. It is likely that the English adopted their usual battle line of longbowmen on either flank, with men-at-arms and knights in the centre. They might also have deployed some archers in the centre of the line. The English men-at-arms