USAHS Acadia

On October 16, 1942, at Boston, WSA allocated Acadia to the War Department on a bareboat basis for operation under the newly established Transportation Corps under which ships could be used as troop transports and ambulance ships for evacuation of wounded.[2][15] During May 1942 Acadia was withdrawn from ordinary transport service and outfitted at the Boston Port of Embarkation for such a combined function with a troop capacity of 1,100 troops to overseas destinations and 530 patients on the return voyage; making the first voyage as such in December 1942.[11]

Private Martin Lipschultz, member of the ship's 204th Medical Hospital Ship Company, described the arrangements:

"The Acadia was the first combined troop-transport-hospital ship to sail from the United States in World War II with a full hospital complement aboard. The 204th Medical Hospital Ship Company consisted of 18 Officers, 37 Nurses, and 94 Enlisted Men (it was activated April 1943). At the time of its first trip the German U-Boat menace was far from gone, and the Acadia with her precious cargo of troops, would have been a fine target for any enemy torpedo...

"The first voyage ended at Casablanca, French Morocco… For the next 4 months the Acadia would be crossing between North Africa and New York, carrying troops on the outbound trip and wounded patients on the return voyage..."[16]

In the early days of the war the Army had requested hospital ships but both the Bureau of the Budget and Maritime Commission had declined the request and noted such ships were properly the Navy's responsibility. When the Army renewed the request the administrator of the Maritime Commission, who also served as head of the War Shipping Administration, required the Army and Navy to agree on the strategic requirements for such ships before any allocation would be made.[17] The Army had decided on the dual troop transport ambulance ship solution until events forced a change to Hague Convention protected hospital ships. One such event was the refusal of both the North African and European Theater commands to load helpless, non ambulatory, patients aboard unprotected ships subject to attack. There was also evidence that the Germans, Italians and Japanese were respecting hospital ship status.[18]

Acadia as a hospital ship in the Italian Campaign in 1943

On March 30, 1943, the Army's Surgeon General recommended Acadia be immediately registered as a hospital ship under the convention due to the urgency of the North African situation.[19] On May 6 the State Department was notified of the designation and Acadia, not needing extensive conversion due to the previous ambulance ship role and requiring mainly new paint and markings.[20] The quick conversion of Acadia is described by Private Martin Lipschultz:

"Then followed a short break with layover in New York harbor, while the ship exchanged her gray war paint coat for a white and green one. The anti-aircraft and other guns, the Navy crew, and the troopship bunks all went off, and after being duly registered under the Treaties of The Hague Convention, the new United States Army Hospital Ship Acadia was ready to sail once more."[16]

In June 1943 the Joint Chiefs of Staff had agreed that hospital ships would be the "normal means" of transporting helpless patients.[21] Earlier, in April, Army officials had decided on a fundamental difference between the function of Army hospital ships and Navy hospital ships in which the Army ships' medical facilities would be equipped only for emergency treatment of patients being transported between rear area hospitals or overseas to the United States and not the primary diagnosis and treatment of battle casualties as were the Navy's ships.[19] The Charleston Port of Embarkation had been selected as the "home port" for Atlantic hospital ships in 1943 and, after embarking medical staff, supplies and issuing the identification required by the convention for all ship's personnel, Acadia sailed from Charleston on June 5, 1943, for North Africa as the first United States Army Hospital Ship Acadia.[22][23][note 1]

Acadia, with a capacity for 788 patients and three surgical teams had no water ambulances was the larger of two hospital ships evacuating U.S. wounded from North Africa, but was too large to dock at Bizerte.[24][25][note 2] On the first evacuation in June 1943 the hospital ship lifted 788 patients from Oran to the United States.[26] The general shortage of ships meant that only three Army hospital ships, USAHS Seminole and USAHS Shamrock along with Acadia, were available in theater by the end of 1943 so that only 3,593 patients were evacuated to the United States by hospital ship as opposed to 16,284 by troop ship.[27]

During the Italian Campaign, though the ship did get to Italy, Acadia and Seminole were mainly used to transport patients from North African rear area hospitals to the United States while Shamrock was the only Army hospital ship normally engaged in transporting patients from Italy to North Africa.[23][28] With the landings in Normandy patients were evacuated to the United Kingdom and Acadia was diverted to the Mediterranean theater.[29] The hospital ship made a brief appearance in the Pacific in 1945.[30]