To the northwest of Ladakh, and to the north of Kashmir, lies the region of Baltistan. Muhammad Shah, the son of the ruler of Skardu, Raja Ahmad Shah, fled to Leh and sought the aid of the Gyalpo and Zorawar against his father. But some of the Ladakhi nobles allowed Ahmad Shah to imprison his son and sought his aid in a general rebellion against the Dogras. After defeating the Ladakhi rebels Zorawar invaded Baltistan in the winter of 1839/40 (Petech, Kingdom of ladakh, p. 144, Datta, Ladakh, p. 122 etc. etc.), adding a large contingent of Ladakhis to his army.