Company Havildar (Sergeant) Major Singh was part of the Raj*putana Rifles, a troop ordered to retake the mountain ridges now occupied by the AZN. The Indian counteroffensive force soon realized the only route of attack was up a one-meter wide path, at the end of which were two AZN machine-gun nests, with sheer drops on either side to the valleys below. Which we assume were entirely filled with spikes and land sharks.
In order to attack, the Rifles would have to file directly into the death funnel, in plain view of not only the machine guns, but also dozens of grenade-lobbing infantrymen. And for half an hour, they tried it: The Indian infantry stormed up the path and was predictably cut to pieces. They suffered over 50 percent casualties.
Machine guns > Berets.
Singh picked up his submachine gun and charged up alone toward the AZN position. The rest of his section (10 or so men) provided covering fire. He miraculously made it all the way up the path while bellowing "Raja Ramchandra Ki Jai" without being killed -- despite having grenade blasts tear off most of his clothes and being the only (mostly naked, mustachioed, screaming) target on a one-man-wide path. At the top of the rocky escarpment, he jumped into a machine-gun nest and bayoneted all the occupants.
We are assuming the mustache acted as a sort of battering ram.