The Knight at War. How did his role change and was their any place for chivalry on the battlefield during the late medieval period?

When William I invaded England in 1066 he did so on horseback. In the battle of Hastings the foot-soldier based army of the English wilted under the charge of the Norman knights. With this conquest, Marcus Bull argues, the old era of foot-soldier armies was wiped away and the new era of the horse-backed knight began. Up until the end of the thirteenth century the mass cavalry charge was the ace-card of battle. The destructive fury …

…Chevaucheé and siege were the preferred tactics of war and the set-piece battle was something oft avoided and remarkably by their rarity. Chivalry was still aspired to, as we can see from the actions of the Black Prince and King Jean. However, the former 'hero's' actions highlight the fact that sometimes chivalry was just ignored and in some cases (that of Henry V) it simply would not fit into a successful battle-plan.