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.
Classical Age of the Ottoman Empire
Rapid expansion resumed under Selim I (r. 1512-1520), who defeated the Safavids in the Battle of Chaldiran in 1514, annexing much of eastern Anatolia and briefly occupying Tabriz. In 1516 he led a campaign against the Mamluk Sultanate, conquering first Syria and then Egypt the following year. This marked a dramatic shift in the orientation of the Ottoman Empire, as it now came to rule over the Muslim heartlands of the Middle East, as well as establishing its protection over the holy cities of Mecca and Medina. This increased the influence of Islamic practices on the government of the empire, and facilitated much greater interaction between the Arabic-speaking world and the Ottoman heartlands in Anatolia and the Balkans. Under Selim's reign the empire's territory expanded from roughly to .