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.
List of campaigns of Suleiman the Magnificent
In 1520, Suleiman became the Sultan at the age of 25, succeeding his father Selim I (who had himself more than doubled the size of the Empire through his own campaigns), and began a series of military conquests. In addition to campaigns led by his viziers and admirals, Suleiman personally led 13 campaigns. The total duration of these campaigns was ten years and three months. The details of the first eight campaigns were preserved in Suleiman's diary. His main opponents were Ferdinand I from the House of Habsburg (later the Holy Roman Emperor), and Tahmasp I of Safavid Persia. Most of Suleiman's campaigns were directed to the west. In 1521 the Ottomans captured Belgrade, which had been besieged unsuccessfully by Mehmed the Conqueror, and in 1526 the Battle of Mohács ended with the defeat of Louis II of Hungary. But Suleiman did not annex most of Hungary till 1541. In 1529 Suleiman's conquests were checked at the siege of Vienna. Although from 1529 to 1566 the borders of the Ottoman Empire moved further west, none of the later campaigns achieved the decisive victory that would secure the new Ottoman possessions. He annexed most of the Middle East in his conflict with the Safavids. Under Suleiman's rule, the Ottoman annexed large swathes of North Africa as far west as Algeria, while the Ottoman fleet dominated the seas from the Mediterranean to the Red Sea and the Persian Gulf.