During late August and early September No. 75 and No. 76 Squadrons were involved in the Battle of Milne Bay. On 25 August No. 76 Squadron aircraft bombed a Japanese naval convoy which was approaching the area. While this attack damaged several ships, the force continued on and landed troops at Milne Bay on the night of 25/26 August. From dawn the next day the two Kittyhawk squadrons were heavily engaged with attacking Japanese positions and intercepting Japanese air raids on the area. On 28 August the Kittyhawks were withdrawn to Port Moresby when the Japanese troops came close to their airstrips, but they returned to Milne Bay the next day. No. 75 and No. 76 Squadrons supported the Allied counter-offensive at Milne Bay which ended with the remaining Japanese troops being evacuated in early September. The squadron flew 220 sorties between 26 and 5 September but suffered a heavy blow when Squadron Leader Turnbull was shot down and killed on 27 August. Turnbull was replaced by Squadron Leader Keith Truscott that day. Following the battle Lieutenant General Sydney Rowell, the commander of New Guinea Force, stated that the attacks made by the two squadrons on the day of the Japanese landing were "the decisive factor" in the Allied victory. No. 76 Squadron was relieved by two United States Army Air Forces (USAAF) squadrons on 21 September and began moving to the Darwin area of northern Australia the next day.