Warsaw, Poland: Nazi forces established the Warsaw Ghetto shortly after taking control of Poland in 1939. The ghetto was used to congregate and effectively imprison the Warsaw’s Jewish population, some 400,000 people. After Operation Reinhart called for the implementation of the plan to murder European Jews, most of the inhabitants of the ghetto were forcibly loaded onto trains, bound for the death camps of Auschwitz and Treblinka. In 1943, ghetto residents unsuccessfully mounted an armed rebelled against the Nazis. Today, a small memorial park stands in the location of the Warsaw ghetto, and markers indicate the borders of the wall used to keep residents inside. Several large stone memorials honor those who were imprisoned and pay special tribute to the heroes of the uprising.