Jalal al-Din only ruled his ancestral kingdom in Khwarazm briefly, until he was forced to leave for the southwestern part of the realm (roughly corresponding to present-day Afghanistan), due to facing opposition by many of his Turkic commanders, who supported his brother and original heir-apparent, Uzlagh-Shah. The following year, the Khwarazmian capital of Gurganj was captured and devastated by the Mongols. Meanwhile, at the city of Ghazni, Jalal al-Din rallied a substantial army which consisted of Khwarazmians, Turks, and Ghurids, subsequently defeating the pursuing forces of the Mongol leader Genghis Khan at the Battle of Ustuva, Battle of Kendakhar, Battle of Waliyan, Battle of Djerdin, battle of Parwan. Jalal al-Din was, however, forced to withdraw to northwestern India by the Mongol forces.