Under Hitler the Nazi Party grew steadily in its home base of Bavaria. It organized strong-arm groups to protect its rallies and meetings. These groups drew their members from war veterans groups and paramilitary organizations and were organized under the name Sturmabteilung (SA). In 1923 Hitler and his followers felt strong enough to stage the Beer Hall Putsch, an unsuccessful attempt to take control of the Bavarian state government in the hope that it would trigger a nationwide insurrection against the Weimar Republic. The coup failed, the Nazi Party was temporarily banned, and Hitler was sent to prison for most of 1924.
By January 1945 Soviet troops were advancing towards Auschwitz. In desperation to withdraw, the Nazis sent most of the 58,000 remaining prisoners on a death march to Germany, and most prisoners were killed en route. When the Soviet army liberated Auschwitz on January 27, soldiers found only 7,650 barely living prisoners throughout the entire camp complex. In all, approximately one million Jews had been murdered there.
Nazi Germany maintained concentration camps (German: Konzentrationslager, KZ or KL) throughout the territories it controlled before and during the Second World War. The first Nazi camps were erected in Germany in March 1933 immediately after Hitler became Chancellor and his Nazi Party was given control of the police by Reich Interior Minister Wilhelm Frick and Prussian Acting Interior Minister Hermann Göring. Used to hold and torture political opponents and union organizers, the camps initially held around 45,000 prisoners. In 1933–1939, before the onset of war, most prisoners consisted of German Communists, Socialists, Social Democrats, Roma, Jehovah's Witnesses, homosexuals, and persons accused of 'asocial' or socially 'deviant' behavior by the Germans.