It resulted in an overwhelming victory for Nader and the Safavid cause he had taken up, though by itself it did not end Ashraf's rule in Iran, it was a significant triumph which led to further successes in the following engagements of the campaign to restore Tahmasp II to the throne.
Leaving a token force behind to resume the siege of Semnan Ashraf marched east towards Shahroud sending a fraction of his command ahead to seek out and destroy Nader's artillery.
In a break with conventional deployment patterns in oriental armies of this period Nader placed his artillery pieces behind his line infantry, where from their elevated positions on the high ground they overlooked the compact formations of Persian Jazāyerchi (musketeers) at the base of the hills as well as the valley in front of them.
A harrowing roar of cannon fire echoed throughout the valley as the Persian guns atop the crest of the hills were submerged under a white cloud of billowing smoke causing "three or four hundred Afghan soldiers to be sliced through like cucumbers".
As the flanks of the Afghan army came into range of the Jazāyerchi they were shot to pieces as the Persian officers withheld their infantry's first volley until they could make out their enemies faces from the crowd, (perhaps a distance of a few dozen metres).
The momentum of the Afghan charge had been sapped with the rear ranks falling over and trampling the remains of their shattered comrades in a staggered advance giving way to a terrible confusion with dust and smoke all around, incessant volleys from Persian musketeers, cannonballs striking punching through the flesh of man and beast alike as the zamburaks having found Ashraf's men within their range brought their swivel guns to bear.
In the ensuing melee that developed the Jazāyerchi (who were armed with swords as well as other weaponry for hand-to-hand fighting) succeeded in pushing through the nucleus of their opponents formation and therefore in effect bisecting Ashraf's army, obliging it to flee the field having been completely bloodied.