What problems did people fighting in the crusades face?

People fighting in the Crusades faced numerous challenges, including harsh environmental conditions such as extreme weather and difficult terrains. They dealt with supply shortages, leading to hunger and disease, as well as the threat of ambush and combat with local forces. Additionally, internal divisions among different factions and the strain of long campaigns created morale issues and logistical difficulties. The complex political landscape of the time also posed challenges in maintaining alliances and achieving their objectives.