The Third Reich first used concentration camps as places of unlawful incarceration of political opponents and other "enemies of the state". Large numbers of Jews were not sent there until after Kristallnacht in November 1938. Although death rates were high, the camps were not designed as killing centers. After war broke out in 1939, new camps were established, some outside Germany in occupied Europe. In January 1945, the SS reports had over 700,000 prisoners in their control, of which close to half had died by the end of May 1945 according to most historians. Most wartime prisoners of the camps were not Germans but belonged to countries under German occupation.
At the end of the war, in an effort to remove the traces of the crimes they had committed, the SS began dismantling and razing the gas chambers, crematoria, and other buildings, as well as burning documents. Prisoners capable of marching were evacuated into the depths of the German Reich, and thousands of marchers died of hunger, exhaustion and exposure. Those who remained behind in the camp and survived long enough were liberated by Red Army soldiers on 27 January 1945.
As the calibre of the orchestra improved under the baton of Laks, the SS began to make more frequent and diverse requests of the musicians. On Sundays they were forced to give concerts of ‘light’ music, and they expanded their repertoire to include excerpts from operas and operettas. They were also frequently given special requests by various guards. They composed special musical medleys in honour of SS officials' birthdays. Some Nazis regularly attended rehearsals, playing music with the musicians, and even on occasion befriending them. Members of the orchestra were also frequently commanded to entertain at late-night parties for camp VIPs and the guards.
Schindler grew up in Svitavy, Moravia, and worked in several trades until he joined the Abwehr, the military intelligence service of Nazi Germany, in 1936. He joined the Nazi Party in 1939. Prior to the German occupation of Czechoslovakia in 1938, he collected information on railways and troop movements for the German government. He was arrested for espionage by the Czechoslovak government but was released under the terms of the Munich Agreement in 1938. Schindler continued to collect information for the Nazis, working in Poland in 1939 before the invasion of Poland at the start of World War II. In 1939, Schindler acquired an enamelware factory in Kraków, Poland, which employed at the factory's peak in 1944 about 1,750 workers, of whom 1,000 were Jews. His Abwehr connections helped Schindler protect his Jewish workers from deportation and death in the Nazi concentration camps. As time went on, Schindler had to give Nazi officials ever larger bribes and gifts of luxury items obtainable only on the black market to keep his workers safe.