Classical Age of the Ottoman Empire
Expansion continued during the first half of the reign of Suleiman I (r. 1520-1566), who conquered first Belgrade (1521) and Rhodes, before invading Hungary in 1526, defeating and killing King Louis II in the Battle of Mohács and briefly occupying Buda. Lacking a king, Hungary descended into civil war over the succession, and the Ottomans gave support to John Zápolya as a vassal prince. When their rivals the Habsburgs began to achieve the upper hand, Suleiman directly intervened by again conquering Buda and annexing it to the empire in 1541. Elsewhere, Suleiman led major campaigns against Safavid Iran, conquering Baghdad in 1534 and annexing Iraq. Ottoman rule was further extended with the incorporation of much of North Africa, the conquest of coastal Yemen in 1538, and the subsequent annexation of the interior.
Turkish Sudan
Muhammad Ali's immediate successors, Abbas I (1849–54) and Said (1854–63), lacked leadership qualities and paid little attention to Sudan, but the reign of Ismail I (1863–79) revitalized Egyptian interest in the country. In 1865 the Ottoman Empire ceded the Red Sea coast and its ports to Egypt. Two years later, the Ottoman Sultan formally recognized Ismail as Khedive of Egypt and Sudan, a title Muhammad Ali had previously used without Ottoman sanction. Egypt organized and garrisoned the new provinces of Upper Nile, Bahr al Ghazal, and Equatoria and, in 1874, conquered and annexed Darfur.