The crusaders had to travel great distances, often across treacherous terrain, and they did not have the benefit of modern transportation or communication technologies. They also had to carry all of their own supplies, including food, water, and weaponry.
2. Disease:
The crusaders were exposed to a wide variety of diseases, many of which they had never encountered before. These diseases, such as dysentery, typhoid, and malaria, often spread quickly through the crusader armies, resulting in widespread death and disability.
3. Enemy Attacks:
The crusaders were constantly under attack from the Muslims, who were often better organized and more experienced in warfare. The crusaders were also outnumbered, and they did not have the advantage of surprise.