The Golden Horde, self-designated as Ulug Ulus (lit. 'Great State' in Turkic), was originally a Mongol and later Turkicized khanate established in the 13th century, originating from the northwestern part of the Mongol Empire. After the division of the Mongol Empire in 1259, it became a functionally independent khanate. It is also known as the Kipchak Khanate or the Ulus of Jochi, and replaced the earlier, less organized Cuman–Kipchak confederation.
It originally consisted of the lands bequeathed to Jochi (d. 1225). It greatly grew in size under Batu Khan, the founder of the Blue Horde. After Batu's death in 1255, his dynasty flourished for a full century, until 1359, though the intrigues of Nogai instigated a partial civil war in the late 1290s. The Horde's military power peaked during the reign of Özbeg Khan (1312–1341), who adopted Islam. The territory of the Golden Horde at its peak extended from Siberia and Central Asia to parts of Eastern Europe from the Urals to the Danube in the west, and from the Black Sea to the Caspian Sea in the south, while bordering the Caucasus Mountains and the territories of the Mongol dynasty known as the Ilkhanate.