The armies of the Crusades (11th-15th centuries CE), which saw Christians and Muslims struggle for control of territories in the Middle East and elsewhere, could involve over 100,000 men on either side who came from all over Europe to form the Christian armies and from all over western Asia and North Africa for the Muslim ones. https://www.worldhistory.org/article/1281/the-armies-of-the-crusades/ #History #Crusades #EighthCrusade #FifthCrusade