On 6 September 1965, during the attack on Burki in Pakistan, Subedar Ajit Singh was given the task of destroying a gun emplacement that was holding up the attack. In complete disregard of his safety, he charged the emplacement single-handed, and though wounded in the chest by a burst of medium machine gun fire, he pressed home the attack and destroyed the post by lobbing a grenade through a loophole in the emplacement. This gallant act not only removed the menace of the machine gun post but also inspired his comrades to destroy the enemy position. Subedar Ajit Singh subsequently succumbed to his injuries.

In this action, Subedar Ajit Singh displayed supreme courage and devotion to duty of an exceptional order.