Unit 731 (Japanese: 731部隊, Hepburn: Nana-san-ichi Butai),[note 1] short for Manchu Detachment 731 and also known as the Kamo Detachment[3]: 198 and the Ishii Unit,[5] was a covert biological and chemical warfare research and development unit of the Imperial Japanese Army that engaged in lethal human experimentation and biological weapons manufacturing during the Second Sino-Japanese War (1937–194
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