Sublime Porte, the new DLC of Field of Glory II: Medieval is out now.
At the end of the thirteenth century, with the Seljuk Sultanate of Rum in terminal decline, Anatolia was divided into several small independent Turkish principalities called beyliks.
At first, the Ottomans battled against the Byzantines for control of the local Anatolian cities, but in 1354 they seized their first European territory when they took Gallipoli. This brought them into conflict with the other Balkan Christian states, including Serbia, Bulgaria, Hungary, Wallachia, Moldavia, and Albania. The Ottomans were generally victorious in these wars for the next fifty years, becoming the dominant Balkan power.
This run of success was briefly interrupted in 1402 when the Turco-Mongol conqueror Timur defeated the Ottomans at the Battle of Ankara. With Sultan Bayezid I captured and dying in captivity the following year, the empire was thrown into a chaotic civil war between Bayezid's sons, with order only being restored in 1413 when Mehmed I became Sultan.
The conquests resumed, and another Crusade was defeated at Varna in 1444. Finally, the Turks conquered the great city of Constantinople in 1453, making it the Ottoman capital.
Timur was born in 1336 into a noble family in the Turco-Mongol Barlas confederation in Transoxiana (in modern-day Uzbekistan). Rising to control Transoxiana by 1370, he created the Timurid Empire in modern Central Asia, Afghanistan, and Iran. Never defeated in battle, he won victories against the Golden Horde, the Delhi Sultanate, the Ottomans, and the Mamluks, becoming the most powerful ruler in the Islamic world. His defeat of the Ottomans at Ankara in 1402 set back Ottoman expansion for several decades.