During World War II he was conscripted and served in the 69th Infantry Division. He belonged to a scouting party which crossed the Elbe in Torgau on April 25, 1945 and met Soviet troops on the other bank. When the Americans and the Soviets saw bodies of German civilians killed by stray artillery fire near the river the soldiers of both armies swore to do everything to prevent a new war.
In 1946 Polowsky was discharged from the army. Back in the U.S., he unsuccessfully asked the United Nations to declare 25 April a World Day of Peace. During the McCarthyism era he was prosecuted for "un-American activities".
In 1959 he met Soviet Prime Minister Nikita Khrushchev who visited the United States. A short time later he was invited to visit the Soviet Union where he again met Khrushchev in the Kremlin. Then he visited East Germany and met Walter Ulbricht.
Already ill with cancer, Polowsky held his last vigil on Michigan Avenue Bridge on April 25, 1983. He died in Chicago on October 17, 1983. In his will he asked to be buried in Torgau, and was buried there with military honors on November 26, 1983.
- Bettina Broneske: Legendäres Foto mit Joe Polowsky kehrte nach 60 Jahren an seine Wurzeln zurück. In: Lausitzer Rundschau. 28. April 2005