After arriving in Pohang on 4 August, the Air Support Section assumed control of all close air support aircraft for 1st Provisional Marine Brigade engaged on the Pusan perimeter. For the Inchon invasion, MTACS-2's Air Support Section disembarked at Inchon in support of the 1st Marine Division. When the 1st Marine Division sailed for Wonsan, the squadron's Air Support Sections sailed with them. The Air Support section was with the 1st Marine Division from November 27 - December 10, 1950 during the Battle of Chosin Reservoir. They controlled the flow of aircraft in support of the division and also manned a portion of the western perimeter at Hagaru-ri where the Division Headquarters was located.