Surrender After his capture, the U.S. Army handed Hartmann, his pilots, and ground crew over to the Soviet Union on 24 May, where he was imprisoned in accordance with the Yalta Agreements, which stated that airmen and soldiers fighting Soviet forces had to surrender directly to them. Hartmann and his unit were led by the Americans to a large open-air compound to await the transfer. The number of prisoners grew to 50,000. Living conditions deteriorated, and some American guards turned "a blind eye" to escapes. In some cases, they assisted by providing food and maps. Soon after being handed over to the Soviet armed forces, Hartmann experienced the following: The first thing the Russians did was to separate the German women and girls from the men. What followed was a brutal orgy of rape and debauchery by Red Army soldiers. When the greatly outnumbered Americans tried to intervene, the Russians charged towards them firing into the air and threatening to kill them if they interfered. The raping continued throughout the night. The next day a Russian General arrived at the encampment and immediately ordered a cessation... Later when a few Russians violated the order again and assaulted a German girl, she was asked to identify them from a lineup. There were no formalities, no court martial. The guilty parties were immediately hanged in front of all their comrades. The point was made. Initially, the Soviets tried to convince Hartmann to cooperate with them. He was asked to spy on fellow officers and become a stukatch, or "stool pigeon". He refused and was given 10 days' solitary confinement in a four-by-nine-by-six-foot chamber. He slept on a concrete floor and was given only bread and water. On another occasion, the Soviets threatened to kidnap and murder his wife (the death of his son was kept from Hartmann). During similar interrogations about his knowledge of the Me 262, Hartmann was struck by a Soviet officer using a cane, prompting Hartmann to slam his chair down on the head of the Soviet, knocking him out. Expecting to be shot, he was transferred back to the small bunker. Hartmann, not ashamed of his war service, opted to go on a hunger strike and starve rather than fold to "Soviet will", as he called it. The Soviets allowed the hunger strike to go on for four days before force-feeding him. More subtle efforts by the Soviet authorities to convert Hartmann to communism also failed. He was offered a post in the Luftstreitkräfte der Nationalen Volksarmee (East German Air Force), which he refused: If, after I am home in the West, you make me a normal contract offer, a business deal such as people sign every day all over the world, and I like your offer, then I will come back and work with you in accordance with the contract. But if you try to put me to work under coercion of any kind, then I will resist to my dying gasp.