 In 1392, he defeated Farhat-ul-Mulk in the battle of Kamboi, near Anhilwada Patan and occupied the city of Anhilwada Patan.In 1403, Zafar Khan's son Tatar Khan urged his father to march on Delhi, which he declined.As a result, in 1408, Tatar imprisoned him in Ashawal (future Ahmedabad) and declared himself sultan under the title of Muhammad Shah I (r. 1403 - 1404).