Aleutian Islands
U. S. Grant operated between ports on the west coast and into the Aleutian Islands through the outbreak of war in the Pacific on 7 December 1941. She carried passengers and cargo to Alaskan ports as the United States built up its defenses in that area against possible thrusts by Japan. In February and March 1942, U. S. Grant conducted voyages to the Hawaiian Islands. During the former month, she returned some 1,000 enemy aliens (mostly Japanese with a sprinkling of Germans) for placement in internment camps in the southwestern United States. Among these passengers was prisoner of war number one, Lt. Kazuo Sakamaki, whose midget submarine had run aground off Barbers Point, Oahu, on 7 December 1941.
In April, U. S. Grant resumed trips to Alaskan ports carrying troops from Seattle to American bases on the Alaskan mainland and in the Aleutians and continued this vital routine until the spring of 1942. The Battle of the Coral Sea during May 1942 convinced the Japanese that a thrust at Midway Island was imperative, in an attempt to draw out the American fleet - particularly the dwindling number of vital aircraft carriers. Consequently, a powerful Japanese fleet sailed for Midway, while a smaller task force headed northward for the Aleutians to launch a diversionary raid. Carrier-based planes from the carrier JAPANESE AIRCRAFT CARRIER Ryujo struck Dutch Harbor, Alaska, on 3 June, and Japanese troops occupied Attu and Kiska islands on the 7th.
During this time, U. S. Grant carried troops to Kodiak, Alaska, and Cold Bay into the summer. She narrowly escaped being torpedoed while proceeding from Seattle to Dutch Harbor in convoy on 20 July. Alert lookouts picked out the tracks of two torpedoes and evasive action enabled the ship to avoid the deadly "fish" which passed close aboard, from starboard to port.
The venerable transport disembarked Army troops at Massacre Bay on 14 June 1943, three days after the initial landings on Attu. The following month, as American and Canadian troops prepared to assault Kiska, Rear Admiral Francis W. Rockwell broke his flag in U. S. Grant as Commander, Task Force 51. During this operation, U. S. Grant served as a combination transport and communications vessel. The Americans eventually discovered that the Japanese had stolen away like nomads, leaving only a few dogs to "contest" the landings, and had completed their evacuation, undetected by the Allies, by 28 July. [4]
During the Kiska landings, the transport not only carried Army troops, but also a Mexican liaison group; a detachment of Canadian troops, and a group of civilian correspondents. After a period of repairs in late 1943, which lasted into 1944, U. S. Grant resumed coastwise voyages to Alaska.
Caribbean and Pacific service
From April to December, she shifted to the eastern Pacific to operate between Hawaii and the west coast. She often embarked medical patients to return them to the west coast from Hawaiian area hospitals. Arriving at San Francisco after one such voyage on 23 January 1945, U. S. Grant disembarked passengers and got underway the same afternoon without passengers or escort, bound for the Caribbean. Transiting the Panama Canal, after embarking passengers at Balboa, the ship operated in the Caribbean for the next six months, between the West Indies and New Orleans, Louisiana, until the end of the war.
U. S. Grant returned to Pacific duty in September, departing San Francisco on the 18th for Okinawa, via Eniwetok. She arrived at Okinawa on 12 October, in the wake of a destructive typhoon, and took on board 1,273 passengers for transportation to the United States, getting underway from the island on 21 October. Arriving at San Francisco on 7 November, U. S. Grant disembarked her passengers soon thereafter.