After being commissioned, "Liscome Bay" proceeded southwards towards San Diego, California, picking up and ferrying 60 aircraft from San Francisco on the way, arriving on 22 September 1943. For the next month, she engaged in training operations off the Southern California coast. On 11 October, she was designated as the flagship of Carrier Division 24, under the command of Rear Admiral Henry M. Mullinnix. On 14 October, she received her aircraft contingent, and on 21 October, she departed for Pearl Harbor, arriving a week later, on 27 October. She then conducted additional drills and training exercises off of Hawaii until early November, when she was assigned to the invasion fleet assembling for Operation Kourbash. As a member of Carrier Division 24, she departed from Pearl Harbor on 10 November as part of Task Force 52 commanded by Rear Admiral Richmond K. Turner, bound for the invasion of the Gilbert Islands. It was to be her first and last mission.