ISUs operated as part of the US Army Service Corps. The men who volunteered were given jobs, monetary compensation and some freedom of movement. The POWs were promised that they would not see combat or be sent abroad. The 45,000 Italian POWs who joined ISUs moved to places with a shortage of manpower. These areas included coastal, industrial and depot sites across the United States. Each ISU had 40 to 250 men, with an Italian officer as their commander. ISUs worked with both military and civilian personnel. The units supported agriculture, hospitals, Army Depots, seaports and Army Training centers. ISUs were given Italian uniforms with ISU insignia and badges. The remaining 10% of Italian POWs who did not volunteer or who were deemed to be Pro-Fascist were held in isolated camps in Texas, Arizona, Wyoming and Hawaii. The largest Fascist POW Camp was called Camp No. 1 in Hereford, Texas. ISU members called it Campo Dux, which was the name of Mussolini's Fascist youth camps in Italy. Some called these camps camice nere, meaning Blackshirts, in reference to the Fascist paramilitary. Some who did not volunteer were concerned about family members living in German-occupied Northern Italy. Italian Americans in the United States began to look into the low-security Italian POW camps to find relatives, family friends or those from their hometowns. Some Roman Catholic churches hosted dinners on Sunday where local Italian-Americans visited with Italian POWs in the camps. Italian POWs could often leave the camp, escorted by a US soldier. In October 1945, the ISUs were decommissioned and their members returned to Italy. As an acknowledgment of their service, some ISU members became US immigrants. Most arrived home in Italy in January 1946. By the end of the war, the ISUs had contributed millions of hours to the Allied war effort. Some formed bonds and relationships with locals. POW-American couples traveled to Italy to be married before returning to America, due to quotas restricting immigration into the US after the war. Examples of ISUs in America:
Birmingham General Hospital, California about 40 Italian POWs from the North African campaign volunteered at the Hospital.
Letterman Army Hospital
Torney General Hospital
Santa Anita Ordnance Training Center
Camp Anza, the 8th Italian Quartermaster Service Company.
Benicia Arsenal making ammo, 4th, 4th and 50th Italian Quartermaster Service Company.
Camp Cooke, the 140th and 142nd Italian Quartermaster Service Company
Camp Haan, the 3rd Italian Quartermaster Service Company
Mira Loma Quartermaster Depot, 150th, 151st, 152nd, 153rd, and 314th Italian Quartermaster Service Company.
Fort Ord 132nd and 133rd Italian Quartermaster Service Company
Pomona Ordnance Depot 2nd Italian Quartermaster Service Company and 9th Italian Ordnance Medium Automotive Maintenance Company
Camp Roberts 10th Italian Quartermaster Service Company
Camp Ross 11th, 26th, 27th, 127th, 128th, and 302nd Italian Quartermaster Service Company
Presidio of San Francisco 138th and 141st Italian Quartermaster Service Company
Camp San Luis Obispo 15th Italian Ordnance Medium Maintenance Company and 27th Italian Ordnance Heavy Maintenance Company
Sierra Army Depot 119th and 68th Italian Quartermaster Service Company
Camp Stoneman 18th Italian Quartermaster Service Company
Yermo Holding and Re-consignment Point, 129th, 130th, and 131st Italian Quartermaster Service Company
Yuma Test Branch at Camp Laguna to help build and test combat bridges from 1944 to 1945.
Overseas
Over 10,350 ISU men worked in the US Army Quartermaster Corps in France by the end of 1944. ISUs worked with the US 5th Army. They were sent to help in areas that faced a shortage of manpower. Also, they were deployed to Tunisia and Algeria. Some 28,000 ISU men were used to support the invasion of Southern France, called Operation Dragoon.
Italian Army Service Units
Italians who were not POWs, but volunteered to help American and British forces were put into Italian Army Service Units. These were put into U.S.-ITI units or British-ITI units. Italian Army Service Units in Italy were disbanded on July 1, 1945. Many other Italians joined the Italian Co-belligerent Army, a Combat Army of the allies. Some Italian allies units were called the Army of the South, or Italian Liberation Corps.