Territorial evolution of the Ottoman Empire
Suleiman I ( "Süleymān", ; almost always "Kanuni Sultan Süleyman") (6 November 1494  – 5/6/7 September 1566), was the tenth and longest-reigning Sultan of the Ottoman Empire, from 1520 to his death in 1566. Suleiman became a prominent monarch of 16th century Europe. Suleiman personally led Ottoman armies to conquer the Christian strongholds of Belgrade, Rhodes, and most of Hungary. In 1541 he annexed central Hungary while Transylvania became an Ottoman vassal. However rest of the Kingdom of Hungary including western and northern (Upper) Hungary and Croatia still were Habsburgs possessions. Suleiman also conquered Iraq in his conflict with the Safavid dynasty. Under his rule, the Ottoman fleet dominated the seas from the Mediterranean to the Red Sea and the Persian Gulf.
Al-Ashraf Qansuh Al-Ghuri
On the succession, however, of Selim I to the throne of Ottoman Sultanate, things took a very different turn. Not only had the attitude of Shah Ismail I become more threatening, but Sultan Selim I himself was more of the warrior than his father. Selim I set out against him, and the Battle of Chaldiran was fought near Tabriz on August 23, 1514. The fanaticism of the Sufis, which led even to their women joining in the combat, failed against the cavalry and artillery of the Turks, and Ismail after a disastrous defeat fled and escaped. Selim I, his provisions failing, returned westward and spent the winter at Amasia. In the spring taking the field again, he attacked the bey of Dulkadirids who as Egypt's vassal had stood aloof, and sent his head with tidings of the victory to Mamluk Sultan Al-Ashraf Qansuh al-Ghawri. Selim I later overran Diyarbakır and Iraq, taking Roha, Nisibin, Mosul and other cities. Secure now against Shah Ismail I, a larger project dawned upon Selim I; it was the conquest of Egypt, and the fact that the invasion must be made from Syria. With no anxieties toward the North, he could now safely make the advance, and so in the spring of 1516 CE he drew together for this end a great and well-appointed army; and with the view of deceiving Egypt, represented his object to be the further pursuit of Shah Ismail I.