POWs were active in 1944 and 1945 on 66 US military installations, performing support roles such as quartermaster, repair, and engineering work as Italian Service Units. Cossacks On 11 February 1945, at the conclusion of the Yalta Conference, the United States and United Kingdom signed a Repatriation Agreement with the USSR. The interpretation of this agreement resulted in the forcible repatriation of all Soviets (Operation Keelhaul) regardless of their wishes. The forced repatriation operations took place in 1945–1947. Post-World War II During the Korean War, the North Koreans developed a reputation for severely mistreating prisoners of war (see Treatment of POWs by North Korean and Chinese forces). Their POWs were housed in three camps, according to their potential usefulness to the North Korean army. Peace camps and reform camps were for POWs that were either sympathetic to the cause or who had valued skills that could be useful to the North Korean military; these enemy soldiers were indoctrinated and sometimes conscripted into the North Korean army. While POWs in peace camps were reportedly treated with more consideration, regular prisoners of war were usually treated very poorly. The 1952 Inter-Camp POW Olympics were held from 15 to 27 November 1952 in Pyuktong, North Korea. The Chinese hoped to gain worldwide publicity, and while some prisoners refused to participate, some 500 POWs of eleven nationalities took part. They came from all the North Korean prison camps and competed in football, baseball, softball, basketball, volleyball, track and field, soccer, gymnastics, and boxing. For the POWs, this was also an opportunity to meet with friends from other camps. The prisoners had their own photographers, announcers, and even reporters, who after each day's competition published a newspaper, the "Olympic Roundup". At the end of the First Indochina War, of the 11,721 French soldiers taken prisoner after the Battle of Dien Bien Phu and led by the Viet Minh on death marches to distant POW camps, only 3,290 were repatriated four months later. During the Vietnam War, the Viet Cong and North Vietnamese Army took many United States servicemembers as prisoners of war and subjected them to mistreatment and torture. Some American prisoners were held in the prison known to US POWs as the Hanoi Hilton. Communist Vietnamese held in custody by South Vietnamese and American forces were also tortured and badly treated. After the war, millions of South Vietnamese servicemen and government workers were sent