World War II

Comet cleared San Diego, California, on 26 April 1944 carrying U.S. Marines to Pearl Harbor, Territory of Hawaii. She then conducted training in the Hawaiian Islands until 30 May 1944, when she departed for Eniwetok. On 11 June 1944, combat loaded, she put to sea for Japanese-held Saipan, where she unloaded troops and cargo under heavy fire in the initial assault beginning the Battle of Saipan on 15 June 1944. On 22 June 1944 she departed Saipan for Pearl Harbor to load troops for the invasion of Guam, where she landed her men as reinforcements between 23 and 29 July 1944 during the Battle of Guam.

Returning to Pearl Harbor for training until 15 September 1944, Comet then sailed to Manus Island, from which she put to sea 14 October 1944 bound for the landings on Leyte in the Philippine Islands. She put her troops ashore on Leyte between 20 October 1944, the day of the initial assault, and 22 October 1944, thus clearing Leyte Gulf before the great naval Battle of Leyte Gulf in those waters. She returned to Leyte in November 1944, carrying reinforcements from New Guinea.

After that, Comet trained off Nouméa in New Caledonia and at Guadalcanal for the assault on Lingayen Gulf on Luzon in the Philippines, where she arrived on 11 January 1945 with troops to reinforce those who had made the assault landings two days earlier. From New Guinea, she brought another group of reinforcements in February 1945, then departed Lingayen Gulf to carry hospital patients from Pearl Harbor to San Francisco, California.

After an overhaul, Comet cleared Port Hueneme, California, on 4 June 1945, carrying construction battalion men (Seabees) and equipment to Okinawa, where she arrived on 12 July 1945 after calling at various ports en route.

World War II came to end on 15 August 1945.

Postwar

Until 1 August 1946, Comet ranged the Pacific Ocean in the postwar redeployment of military men and the return to the United States of homeward-bound veterans. She made seven transpacific voyages, calling at such ports as Okinawa, Guam, Saipan, Hollandia, Manus, Sasebo, Qingdao, and Taku in the western Pacific; Kodiak, Dutch Harbor, Adak, and Attu in the Territory of Alaska; Seattle, Washington; and San Francisco, San Pedro, and San Diego, California.