The war was fought on the western front after Pakistan launched "Operation Gibraltar" - a covert offensive in which up to 30,000 fighters were pushed across the ceasefire line into Indian-administered Jammu and Kashmir. India retaliated by crossing the international border at Lahore.At midnight on 6 September, India crossed the international border between India and Pakistan and attacked Lahore and Kasur. The Pakistan Army and Air Force prepared for war in a hurry and started attacks on India. The attacks also started in the areas of Jammu and Kashmir. The war was fought on the border until 22 September when India asked for ceasefire. On 8 September, Pakistani pilot Muhammad Mahmood Alam (M.M.Alam) shot down five Indian jets in less than a minute and held the record. Pakistan very small army defended it's second largest city against a huge indian army.