From 1935, the authorities began sending hundreds of Jehovah’s Witnesses to concentration camps, where they were imprisoned with Communists, Socialists, other political prisoners and union members. In May 1938, they accounted for 12 percent of all prisoners at Buchenwald concentration camp near Weimar; by May 1939, they represented 40 percent of all prisoners at Schloss Lichentenburg, the central concentration camp for women, though as the total number of prisoners increased rapidly, the proportion of Witnesses generally fell to about 3 percent. About 2000 Witnesses were eventually sent to Nazi concentration camps, where they were identified by purple triangles; as many as 1200 died in custody, including 250 who were executed.^[30][31] Garbe claims members of the group were special objects of hatred by the SS, receiving beatings, whippings and public humiliation and given the dirtiest and most laborious work details for refusing to salute, stand at attention or sing Nazi songs. They were subjected to high-pressure jets of ice-cold water from fire hydrants and subjected to arbitrary acts of torture, including pushing a fully laden wheelbarrow with their necks while crawling on hands and knees. Others were forced to stand still for an entire day in the heat or cold, or were confined in groups in small closets in an attempt to suffocate them.^[30] From March to December 1938, Jehovah’s Witnesses in Buchenwald were not allowed to send or receive letters or to purchase food. Many approached starvation and were forced to eat leaves from trees and bushes. Many were forced to engage in a “drill” that included rolling, creeping, hopping, and running for 75 minutes while camp guards kicked and beat them, while others, forced to work in stone quarries, were refused medical attention when sick.^[32] Despite persecution, Jehovah’s Witnesses continued to hold secret religious gatherings inside the camps.

Conditions for Witnesses improved in 1942, when they were increasingly given work details that required little supervision, such as farming, gardening, transportation and unloading goods, while others worked in civilian clothing in a health resort, as housekeepers for Nazi officials, or were given construction and craft tasks at military buildings.^[33]

In July 1944, Himmler ordered Ernst Kaltenbrunner, the head of the RSHA, to begin sending Jehovah’s Witnesses to the occupied east. Himmler viewed the Jehovah’s Witnesses as frugal, hard-working, honest and fanatic in their pacifism, and that these traits were extremely desirable for the suppressed nations in the east.^[34]