Medical experimentation on prisoners of war

Nazi concentration camp in Bavaria (1933-1945), with the center in the town of Dachau and a large number of geograhically distributed subcamps

Unit 731 , officially known as the Manchu Detachment 731 and also referred to as the Kamo Detachment and the Ishii Unit, was a secret research facility operated by the Imperial Japanese Army between 1933 and 1945. It was located in the Pingfang district of Harbin, in the Japanese puppet state of Manchukuo, and maintained multiple branches across mainland China and Southeast Asia.

genocide of as many as 3,000,000 Cambodians by communist Khmer Rogue in 1975–79

Nazi women's concentration camp in Brandenburg, Germany (1938-1945)

former Security Prison 21, or S-21, under the Khmer Rouge in Cambodia

unethical experiments on human subjects

psychiatrist (1889–1960)

secret research facility

Japanese human experimentation unit in China (1938–1945)

Japanese army prison camp

defunct South African chemical weapons programme