Abstract: Praise be to God, Lord of the worlds, and prayers and peace be upon the master of the Messengers, Muhammad, may God bless him and grant him peace, and his family and companions, as for after… Since the end of the fifth century AH, the eleventh century AD, the Islamic East has witnessed a major historical event, which is the Crusader aggression against large parts of the Islamic countries. Within a few years, the Crusaders were able to seize a number of Islamic cities and villages, where they established four main Crusader entities, and it was a very big shock to the Muslims.