At that time, "Manchester", docked at San Francisco, was undergoing overhaul. Work was sped up and by 1 August the cruiser was on her way to the Western Pacific. She arrived at Sasebo, Japan, in early September and joined TF 77. As part of a carrier group, she commenced operations in the Yellow Sea, supporting United Nations Forces air efforts against the elongated Communist communications lines by coastal patrol, blockade, and bombardment. On 15 September, "Manchester" provided fire support for the landings at Inchon. After the establishment of major control of the Inchon–Seoul transport complex, she moved north to bombard North Korean troop concentrations on Tungsan Got, while aircraft from her strike force hit the railhead at Ongjin, 27 September. This action effectively slowed reinforcement of Communist forces in the south by disrupting their supply lines and keeping their troops occupied in defensive action.