provided Nazi officials the opportunity to adopt more radical measures against the Jews under the pretext that they posed a threat to Germany. After occupying Poland, German authorities confined the Jewish population to ghettos, to which they also later deported thousands of Jews from the Third Reich. Hundreds of thousands of Jews died from the horrendous conditions in the ghettos in Poland and other parts of Eastern Europe.

Following the invasion of the Soviet Union in June 1941, Einsatzgruppen and Waffen SS units, with support from the Wehrmacht, moved behind German lines to murder Jews, Roma, and Soviet state and Communist Party officials in mass shootings as well as in specially equipped gas vans. Mass shootings of Jews continued throughout the war, many conducted by militarized battalions of theand disease or were killed when they became too weak to work.

My mother ran over to me and grabbed me by the shoulders, and she told me "Leibele, I'm not going to see you no more. Take care of your brother."

—Leo Schneiderman describing arrival at Auschwitz, selection, and separation from his family

The End of the Holocaust

In the final months of the war, SS guards moved camp inmates by train or on forced marches, often called “death marches,” in an attempt to prevent the Allied liberation of large numbers of prisoners. As Allied forces moved across Europe in a series of offensives against Germany, they began to encounter and liberate concentration camp prisoners, as well as prisoners en route by forced march from one camp to another. The marches