After the death of King Abu Sa'id Mirza, the great-grandson of Amir Timur Beg Gurkani, his much reduced Timurid Empire was divided among four of his sons namely; Umar Shaikh Mirza II, King of Ferghana Sultan Ahmed Mirza, King of Samarkand, Bukhara & Hissar Sultan Mahmud Mirza, King of Balkh Ulugh Beg Mirza II, King of KabulA civil war between two brothers Umar Shaikh Mirza II, King of Fergana and Sultan Ahmed Mirza, King of Samarkand and Bukhara was being fought in 1492 when Umar Shaikh died of natural causes leaving his son, the 12-year-old Babur in charge of his Kingdom. Wikipedia