Final answer:
Saladin's forces were able to defeat the military orders due to Saladin's strategic military leadership, the support of the local Muslim population, and the internal conflicts and lack of unity among the military orders.
Step-by-step explanation:
Saladin's forces were successful in defeating the military orders due to several factors. Firstly, Saladin was known for being a strategic and skilled military leader. He was able to gather allies and erode the military power of the Crusaders over time. Additionally, Saladin had the support of the local Muslim population, who viewed him as a heroic figure defending their land against the invaders. This support boosted his forces and morale, making it difficult for the military orders to defeat him. Furthermore, the military orders faced internal conflicts and lack of unity, which weakened their fighting capabilities. The Crusaders also faced challenges in unfamiliar terrain and had difficulty maintaining order in their own territories.