Anti-Semitism (discrimination against Jews) was common in Europe in the 1930s. By the end of the decade, it had escalated into widespread violence. Hitler and the Nazis believed that Jews were racially inferior to Germans, part of what Nazis called the Aryan race. The Nazis also blamed the Jews for Germany’s loss in World War I (1914-18) and the economic crisis that followed. Hitler devised a plan to conquer Europe and eliminate all of its Jews.
On September 1, 1939, Nazi Germany invaded Poland, sparking World War II. The conflict eventually pitted the Allies (which included the United States, Great Britain, and the Soviet Union) against the Axis Powers (which included Germany, Italy, and Japan).
The German army soon overran Denmark, Norway, the Netherlands, Belgium, Luxembourg, and northern France. Southern France officially remained independent, with a government based in the town of Vichy. But the Vichy government worked with the Nazis, helping to deport Jews to places like Auschwitz in Poland, the most infamous of the Nazi concentration camps. There, Jews who were deemed unfit to work were put to death in gas chambers disguised as showers.
Thousands of Jews were saved, however, by various underground resistance groups. If discovered, members of these groups faced certain death, yet they risked it by hiding Jews, smuggling food or weapons to them, or transporting them to safety.