Operation Chengiz Khan was the code name assigned to the preemptive strikes carried out by the Pakistani Air Force (PAF) on the forward airbases and radar installations of the Indian Air Force (IAF) on the evening of 3 December 1971, and marked the formal initiation of hostilities of the Indo-Pakistani War of 1971. The operation targeted 11 of India's airfields and there were artillery strikes on Indian positions in Kashmir. The air attacks failed as India had moved all aircraft to reinforced bunkers in anticipation of preemptive action by Pakistan due to India's support of the Mukti Bahini.