The arrival of the Fatimids to Egypt in the middle of the 4th century AH was an unusual and significant development on the map of the Islamic world. A real competition arose for rule in the Islamic world. The Fatimid conquest represented a revolution in religion, culture and the system of government at the same time. The Fatimid state was established in Egypt in the year 358 AH. / 969 AD. The Fatimids' conquest of Egypt did not come by chance, but rather resulted from a policy that had been studied for a long time, even before the construction of their Mahdist city in Tunisia 304/915 AD. They occupied Alexandria for six months in 306 AH/917 AD, and their campaigns against Egypt failed thanks to the military supplies coming from Baghdad to help the Ikhshidid state. Then Al-Mu'izz Lidin Allah Al-Fatimi3 devoted all his attention to preparing a campaign against Egypt, and he even paid attention to digging wells and establishing rest houses along the desert road leading to Alexandria4.