Assigned to the daring Inchon invasion, "Cavalier" next cleared Yokosuka on 3 September, paused at newly secured Pusan from 5 to 12 September, and in the early evening of 15 September, came into position to begin the arduous landings over the seawalls of Inchon, against enemy resistance which stiffened with each assault wave. "Cavalier" remained off Inchon, receiving casualties, until 20 September, when she cleared for Yokosuka. In October, she carried men and ammunition to both Inchon and Wonsan, and on 1 November, cleared for San Diego, overhaul, and local training.