The prince was only eleven years old, and therefore incapable of properly controlling Egypt, Syria, and his other domains. Husain, one of his relatives, invaded Syria, but in his turn driven back by the Karmates, returned to Egypt and strove to depose Ahmed. These divisions in the reigning family severed the ties which united the provinces of the Egyptian kingdom. To terminate the disturbances, the emirs resolved to seek the protection of the Fatimites. The latter, anxious to secure the long-coveted prize, gladly rendered assistance, and Husain was forced to return to Syria, where he took possession of Damascus, and the unfortunate Ahmed lost the throne of Egypt. With him perished the Ikshid dynasty, which, more ephemeral even than that of the Tulunid, flourished only thirty-four years and twenty-four days. The period upon which this history is now about to enter is of more than usual interest, for it leads immediately to the centuries during which the Arabic forces came into contact with the forces of Western Europe. The town and the coast of Mauritania were then ruled by the Fatimites, a dynasty independent of the Abbasid caliphs of Baghdad. The Fatimites belonged to the tribes of Koramah, who dwelt in the mountains situated near the town of Fez in the extreme west of Africa. In the year 269 of the Hegira, they began to extend their sway in the western regions of Africa, pursuing their conquests farther east. The Fatimite caliph Obaid Allah and his son Abu'l Kasim cherished designs not only upon Egypt, but even aimed at the destruction of the Abbasid caliphate, these plans being so far successful as to leave the Fatimites in secure possession of Alexandria, and more or less in power in Fayum. The Fatimite caliphs had lofty and pretentious claims to the allegiance of the Moslem world. They traced their descent from Fatima, a daughter of the Prophet, whom Muhammed himself regarded as one of the four perfect women. At the age of fifteen she married Ali, of whom she was the only wife, and the partisans of Ali, as we have seen, disputed with Omar the right to the leadership of Islam upon the Prophet's death. Critics are not wanting who dispute the family origin of Obaid Allah, but his claim appears to have been unhesitatingly admitted by his own immediate followers. The Fatimite successes in the Mediterranean gave them a substantial basis of political power, and doubtless this outward and material success was more important to them than their claim to both a physical and mythical descent from the founder of their religion.