It defended the Hussainiwala headworks against an attack by a full infantry brigade supported by armoured columns of the Pakistan Army. The enemy also used artillery fire and air support in this engagement. Two enemy tanks were destroyed and two captured, with several enemy killed. The commanding officer Col. Nolan was killed by an enemy artillery shelling the next morning while supervising operations. It was a major loss to the battalion. The battalion was visited by then Prime Minister Lal Bahadur Shastri, Defence Minister Kamraj, the Chief of Army Staff and other senior officers. Kali Panchwin was awarded the battle honour "Hussainiwala" for its role in the 1965 War. It was among the first units to be moved to the Naga Hills counter-insurgency operations where they fought many successful missions. In an ambush Captain E.J. Tucker lost his life along with several men; for his bravery he was awarded the Ashoka Chakra Award Class I, the highest peacetime gallantry award. After spending time in Firozpur and Fazilka, the unit was deployed to Sikkim. It celebrated its bicentenary in Pune in 1974 with Field Marshal Sam Manekshaw as chief guest. The unit was then deployed to Gulmarg Heights along the Line of Control on the border with China. After a peace tenure in Dehradun, it was deployed in counter-insurgency operations in Manipur and Mizoram. In 1987 it returned to Pune, and subsequently air-lifted to Sri Lanka as part of the Indian Peace Keeping Force. The battalion captured 4 top leaders of the Liberation Tigers of Tamil Eelam in Batticaloa. It won 22 individual awards including one Vir Chakra. The battalion since then has been deployed to Jammu and Kashmir thrice, as well as to Assam and Sikkim.