Original sentence: That war witnessed the first supersonic air combat in the subcontinent when an Indian MiG-21 shot down a PAF F-104 Starfighter.The Indian Air Force has been one of the largest users of the MiG-21 since its initial employment of the plane in the Indo-Pakistani War of 1971
Edited sentence: That war also witnessed the first supersonic air combat in the subcontinent when an Indian MiG-21 shot down a PAF F-104 Starfighter.The Indian Air Force has been one of the largest users of the MiG-21 since its initial employment of the plane in the Indo-Pakistani War of 1971 with good results