This incident in the First Crusade happened this day in 1098 in modern day Syria and resulted in the killing of 20,000 - some of which were eaten as the Crusaders were starving - or was it another reason? "In Ma'arra our troops boiled pagan adults alive in cooking-pots; they impaled children on spits and devoured them grilled."
If you want figures for the First Crusade then look no further than the Perry Miniatures range (see photo) - they are not only very well researched but they are full of character. Have a look at the pictures and see if you can resist the desire to build an army.