A Mamluk is a warrior caste dominant in Egypt. The Mamluks took advantage of their power to become the principal landholders in Egypt. The Mamluk sultans are usually divided into two dynasties, the Bahris , chiefly Turks and Mongols, and the Burjis.The sultans reigned, on the average, less than seven years and usually met violent ends. They defeated the last of the Crusaders and repulsed the Mongol invasion of Syria. The Ottoman ruler, Selim, put an end to the Mamluk sultanate.