End of Medieval Warfare
The first important break from the conventions which dominated medieval warfare was the triumph of the Swiss pike-squares over the mounted knights of Burgundy in a series of pitched battles (1475-7 [C.E.]). The lesson of Morat, Grandson, and Nancy was immediate, important and ineluctable: victory in battle could be won by infantry over cavalry. This shift in military effectiveness removed a crucial restriction on the scale of warfare in Europe. Since a warhorse was not only expensive but also a mark of social rank the size of a cavalry-based army was necessarily circumscribed by the dimensions of the social class which was entitled to go through life on horseback: the knights. There was no such bar to the number of men who could be recruited and issued with a helmet and sixteen-foot pike. Accordingly the eclipse of cavalry by infantry meant that victory in war after the 1470s came to depend not on the quality of the combatants nor on the excellence of their armament, but on their numbers. A government bent on war had now to mobilize and equip every man who could be found.
Emphasis mine.
