At dusk, Rajputs and their allies, retired to their respective camps. The Maratha army however held its positions at the mouth of the pass. The real battle however precipitated in the evening by an unforeseen skirmish. Some Maratha Pindaris from the left wing of Maratha lines, managed to seize animals that were a part of Ismail Beg's contingent. This inevitably led to a small skirmish with Ismail Beg's men. General de Boigne then directed his guns on Ismail Beg's contingent. Caught on unaware, the murderous fire of Maratha guns proved to be deadly. Gopal Bhau and de Boigne, sensing victory, went for the kill. Marathas descended upon enemy camps. Taken aback by the suddenness and the ferocity of the Maratha attack, Rajput resistance capitulated, many were slaughtered in their sleep while others were too intoxicated to fight. The only event worth noting was the Rathor charge on the Maratha right wing. The 4,000 strong Holkar contingent was saved by swift reinforcements sent by Gopal Bhau. The Jaipur Nagas were forced in their positions by the two battalions sent by Boigne. De Boigne after routing the centre and left wing of the alliance, turned all of his forces to the right. The Rathors were soon surrounded and routed, resulting in heavy losses and the death of the Jodhpur general Gangaram. The Gwalior army did not lose any officers apart from two wounded. The victory at Patan destroyed the armies of the two most powerful Rajput kingdoms of India and forced them to pay heavy tributes to the Scindias. Ismail Beg's army was also reduced to a few hundred men and was forced to flee. This victory also showed the whole subcontinent that Maratha power had not faded after Panipat and helped consolidate Maratha rule in northern India.
The aftermath
Pitted against European armed and French trained Marathas, Rajput states capitulated one after the other. Marathas managed to conquerAjmer and Malwa from Rajputs. Although Jaipur and Jodhpur remained unconquered. Battle of Patan, effectively ended Rajput hopes for independence from external interference. Sir Jadunath Sarkar notes:
His victory increased Scindia's influence with the Peshwas in Pune, the seat of Maratha government and firmly established Maratha influence in Rajputana.