Edit: William of Tyre mentions that only about 200 knights fought at the battle of Montgisard (see my video and description of the battle
www.twcenter.net/forums/showthread.php?452114-Campaign-battle-screenshots-and-videos&p=10237040&viewfull=1#post10237040) but he reports 1100 dead and 700 wounded. So clearly the vast majority of those who fought were simple folk, militia and levies of some kind plus a few sergeants. In those days, there was one sergeant following every knight and sometimes they were counted among the knights if they were on horse. So at most, at most, there were 400 knights and sergeants and they were not all killed and wounded otherwise this would have not been a victory for the Crusaders but a massacre. So clearly, the majority of combatants were levies, militia and peasantry. There is another account of a castle being held by 1500 men, most of which were described as militia, without a mention of a single knight being present. The numbers were not small, just the fighting quality of the KoJ was terrible because the majority of the men were untrained or poorly trained locals given a spear and expected to stand up agaist Mulsim fighters who were often slaves trained all their lives to fight for God or their Sultan or for profit and their freedom etc, massive incentives compared with the Christian levies who while on duty there was no one at home tending to their fields or crops except maybe their wives or children.