When France fell to Nazi Germany, the mission to resist the Nazis became increasingly important. Following the establishment of the Vichy France regime during the occupation, Trocmé and his church members helped their town develop ways of resisting the dominant evil they faced. Together they established first one, and then a number of "safe houses" where Jewish and other refugees seeking to escape the Nazis could hide. Many refugees were helped to escape to Switzerland following an underground railroad network. Between 1940 and 1944 when World War II ended in Europe, it is estimated that about 3500 Jewish refugees including many children were saved by the small village of Le Chambon and the communities on the surrounding plateau because the people refused to give in to what they considered to be the illegitimate legal, military, and police power of the Nazis.
By late 1938, the Nazis could claim an impressive series of successes. Germany had staged the 1936 Olympics, annexed Austria and part of Czechoslovakia, and was in the midst of a strong economic recovery fuelled by rearmament. These triumphs had increased the Nazis' popularity and their confidence. President Hindenburg had died and all opposition parties had been abolished. The last conservatives in the cabinet had been replaced by Nazis. The way was clear for radical action.
As if cold-blooded murder of millions of Jews was not enough, it was done with extreme, perverse cruelty. The victims were packed into cattle trains with standing-room only and without food or water, or heat in the winter, or toilet facilities. Many did not arrive at the camps alive. Those who did arrive at their destination had their heads shaved, with the hair to be used for stuffing mattresses. Stripped of all clothing, most were herded naked into the gas chambers. Dr Johann Kremer, a German SS surgeon, described the gassing of a group of French Jews including 150 boys and girls under the age of 15:
Using gas vans, Chełmno had its roots in the Aktion T4 euthanasia program. Majdanek began as a POW camp, but in August 1942 it had gas chambers installed. A few other camps are occasionally named as extermination camps, but there is no scholarly agreement on the additional camps; commonly mentioned are Mauthausen in Austria and Stutthof. There may also have been plans for camps at Mogilev and Lvov.
German officers raided the building and made arrests on August 4, 1944. The arresting officer, Karl Silberbauer, later said he vividly remembered arresting the Franks, and even told Otto Frank, “What a lovely daughter you have.” When Silberbauer’s actions were discovered in 1963, he was suspended from his job at the Viennese police force. He is quoted as saying, “Why pick on me after all these years? I only did my duty. Now I am suspended and I have just bought some new furniture and how am I going to pay for it?" After an investigation, he was allowed to return to his job.
Mengele joined the Nazi Party in 1937 and the Schutzstaffel (SS; protection squadron) in 1938. He received basic training in 1938 with the Gebirgsjäger (light infantry mountain troop) and was called up for service in the Wehrmacht (Nazi armed forces) in June 1940, some months after the outbreak of World War II. He soon volunteered for medical service in the Waffen-SS, the combat arm of the SS, where he served with the rank of SS-Untersturmführer (second lieutenant) in a medical reserve battalion until November 1940. He was next assigned to the SS-Rasse- und Siedlungshauptamt (SS Race and Settlement Main Office) in Poznań, evaluating candidates for Germanization.