Three years after the Sino-Indian conflict, in 1965, Pakistan launched Operation Gibraltar, strategy of Pakistan to infiltrate Jammu and Kashmir, and start a rebellion against Indian rule. This came to be known as the Second Kashmir War. This was the first time the IAF actively engaged an enemy air force. However, instead of providing close air support to the Indian Army, the IAF carried out independent raids against PAF bases. These bases were situated deep inside Pakistani territory, making IAF fighters vulnerable to anti-aircraft fire. During the course of the conflict, the PAF enjoyed technological superiority over the IAF and had achieved substantial strategic and tactical advantage due to the suddenness of the attack and advanced state of their air force. The IAF was restrained by the government from retaliating to PAF attacks in the eastern sector while a substantive part of its combat force was deployed there and could not be transferred to the western sector, against the possibility of Chinese intervention. Moreover, international (UN) stipulations and norms did not permit military force to be introduced into the Indian state of J&amp;K beyond what was agreed during the 1949 ceasefire. Despite this, the IAF was able to prevent the PAF from gaining air superiority over conflict zones. The small and nimble IAF Folland Gnats proved effective against the F-86 Sabres of the PAF earning it the nickname "Sabre Slayers". By the time the conflict had ended, the IAF lost 60–70 aircraft, while the PAF lost 43 aircraft. More than 60% of IAF's aircraft losses took place in ground attack missions to enemy ground-fire, since fighter-bomber aircraft would carry out repeated dive attacks on the same target. According to, Air Chief Marshal Arjan Singh of the Indian Air Force, despite having been qualitatively inferior, IAF achieved air superiority in three days in the 1965 War.