Maharaja
Jaswant Singh, of
Marwar, was a high-ranking Mughal officer who died at his post on the
Khyber Pass on 10 December 1678 without leaving a male issue; two of his wives were pregnant at the time of his death, leaving his succession unclear. On learning of his death, Aurangzeb, immediately dispatched a large army on 9 January 1679 to occupy
Jodhpur. One of the divisions of this army was commanded by Muhammad Akbar. The occupation of Jodhpur was ostensibly to secure the succession for any male infant born to Jaswant's pregnant widows. Aurangzeb declared that such rightful heir would be invested with his patrimony upon coming of age. However, relations between Jaswant Singh and Aurangzeb had not been good, and it was feared that Aurangzeb would annex the state on this pretext. Indeed, incumbent Marwari officers were replaced by Mughals. After effectively annexing the largest Hindu state in
northern India, Aurangzeb reimposed the
jaziya tax on its non-Muslim population on 2 April 1679 One of Jaswant's pregnant wives, Rani Jadav Jaskumvar, delivered a son,
Ajit Singh. Officers loyal to Jaswant Singh brought his family back to Jodhpur and rallied the clan to the standards of the infant. The
Rathore Rajputs of Jodhpur forged an alliance with the neighboring
Sisodia Rajputs of
Mewar.
Raj Singh I withdrew his army to the western portion of his kingdom, marked by the rugged
Aravalli Hills and secured by numerous hill-forts, triggering the
Rajput rebellion. From their positions, the smaller but faster Rajput cavalry units could surprise the Mughal outposts in the plains, loot their supply trains, and bypass their camps to ravage neighbouring Mughal provinces. In the second half of 1680, after several months of such setbacks, Aurangzeb decided on an all-out offensive.
Niccolao Manucci, an Italian gunner in the Mughal army, says: "
for this campaign, Aurangzeb put in pledge the whole of his kingdom." Three separate armies, under Aurangzeb's sons Muhammad Akbar,
Azam Shah and
Mirza Muhammad Mu'azzam, penetrated the
Aravallis from different directions. However, their artillery lost its effectiveness while being dragged around the rugged hills and both Azam Shah and Mirza Muhammad Muaazzam were defeated by the Rajputs and retreated. ==Rebellion against Aurangzeb==