Final answer:
In 1933, the Nazis built concentration camps like Dachau to house political dissenters, but these camps later also imprisoned and murdered millions of Jewish people and other groups deemed undesirable by the Nazi regime.
Step-by-step explanation:
In 1933, the Nazis initially built concentration camps to house political dissenters. The first of these camps, Dachau, was established shortly after Hitler became chancellor and was aimed at detaining those who opposed the Nazi regime. Over time, the scope of who was sent to concentration camps expanded to include Jewish people, Roma (gypsies), homosexuals, Jehovah's Witnesses, and other minority groups deemed undesirable by the state. By 1945, the Nazis had established over 1000 such camps, some of which evolved into death camps where millions were murdered.
The persecution of Jewish people under Nazi rule began with laws like those enacted on April 7, 1933, which excluded them from public service and escalated to the Nuremberg Laws of 1935, leading to their eventual incarceration and murder in vast numbers. In addition to political prisoners, concentration camps later also housed a wide variety of groups that the Nazis considered enemies or inferior, subjected them to forced labor, and executed many. Sites like Auschwitz became synonymous with the horrors of the Holocaust, serving both as labor camps and as sites of mass extermination.