Factual error: It is mentioned that Saladin has crossed the Jordan River and is on his way to Jerusalem. Balian then rides to Kerak to defend the city. But Kerak is situated East of the Jordan River and South of where it runs into the Dead Sea, so Saladin would reach Kerak long before he crossed the Jordan River.Jacob La Cour
Factual error: Prior to the battle with Saladin, there is a shot of the crescent moon. A star is shown inside the disk of the moon, but it should have been blocked out by the moon's presence.