In 1965, L.t. Col. Salim Galeb commanded the 3 cavalry in the Khem Karan sector. They were deployed in the Bhikhiwind Patil area to prevent an enemy attack thrust. On September 8, as enemy tanks broke through the Indian defences, L.t. Col Caleb intercepted them on the Bhikhiwind Khem Karan road and in the ensuing battle destroyed 6 tanks. The enemy was again thwarted as it moved towards the west and soon its advance was halted.

On September 10, as the Pakistani forces sought another breakthrough, the 3 cavalry deployed itself in two semi-circles prepared for any eventuality. At 3.30 p.m. a fierce tank battle commenced and accurate Indian firing destroyed 15 Patton tanks. Nine tanks were captured.

L.t. Col. Caleb received the Mahavir Chakra for leading his forces with rare anticipation and courage.