Wiese surrendered to U.S. forces at the end of the war and was handed over by the Americans to the Soviet Red Army on 6 September 1945. Wiese spent over four years in Soviet prisoner of war camps and was released on 28 November 1949. He was officially credited with 133 victories claimed in 480 combat missions. Additionally, he had 25 more unconfirmed claims. Among his claims were over 50 Il-2 Sturomoviks. Soviet fighter pilots therefore greatly respected Wiese, and referred to him as the "Lion of Kuban", a name he earned during combat over the Kuban bridgehead.