On 18 March 1956 he was posted with
Jammu & Kashmir Rifles at
Hussainiwala near
Ferozepore. On the night of 18/19 March J&K RIF's unit was attacked by elements of the Pakistani Army. His unit responded with a counterattack and chased them away from the right side of the dam. Other hostile elements then moved into positions at Bela, starting to fire towards the left side of the dam with light machine guns. This made it difficult for India to retain the dam and safeguard the troops there. Sunder Singh's name was suggested to destroy the position, and on being ordered Sunder agreed immediately. Armed with six hand grenades and amidst hostile fire, he crawled one hundred and fifty meters to a rocky area. When he was near to the enemy position, he threw his first grenade which killed three enemies and silenced their guns. He did this three times which allowed Jammu & Kashmir Rifles to possess the right end of dam. ==Ashoka Chakra awardee==