The Battle of Patan was fought on 20 June 1790 between the Maratha Kingdom of Gwalior supported by the Peshwa & Holkar and the alliance formed by the Rajput Kingdoms of Amber, Kingdom of Marwar supported by Mirza Ismail Beg who betrayed Mahadji and joined the Rajput army in exchange for a promise of money.

Bhau's squadron, through their hit and run tactics, led the Rathors into a trap where Boigne shot them down and then bayoneted the surviving horsemen.

Boigne, after defeating the Rathors, immediately turned his guns towards Ismail and shot his men down.

The 4,000 strong Holkar contingent was saved by swift reinforcements sent by Gopal Bhau.

De Boigne, after routing the centre and left wings of the alliance, turned all of his forces to the right.