The Theresienstadt ghetto was established by the Nazis in an 18th century fortress in Czechoslovakia on November 24, 1941. More than 150,000 Jews passed through the ghetto during its four-year existence, which was used as a holding area for eventual murder in Auschwitz. By 1943, rumors began circulating in the international community that the Nazis were exterminating Jews in gas chambers, and that the conditions of the ghettos did not permit survival. The Nazis rebuilt parts of this ghetto to serve as a “showpiece” for propaganda purposes. Flower gardens were planted in the ghetto. Shops, schools, and a cafe were built. When an investigating commission of the International Red Cross came to visit, they did not see a typical ghetto. In July 1944 the Nazis made a documentary propaganda film about life in this ghetto. After the movie was completed, most of the Jewish “actors” were shipped to their death at Auschwitz.
With this police infrastructure in place, opponents of the Nazis were terrorized, beaten, or sent to one of the concentration camps the Germans built to incarcerate them. Dachau, just outside of Munich, was the first such camp built for political prisoners. Dachau's purpose changed over time and eventually became another brutal concentration camp for Jews.
Mengele sailed to Argentina in July 1949, assisted by a network of former SS members. He initially lived in and around Buenos Aires, then fled to Paraguay in 1959 and Brazil in 1960, while being sought by West Germany, Israel, and Nazi hunters such as Simon Wiesenthal who wanted to bring him to trial. He eluded capture in spite of extradition requests by the West German government and clandestine operations by the Israeli intelligence agency Mossad. He drowned in 1979 after suffering a stroke while swimming off the Brazilian coast, and was buried under a false name. His remains were disinterred and positively identified by forensic examination in 1985.