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Unit 731
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Unit 731

Japanese military unit [World War II]
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Unit 731 was a covert biological and chemical warfare research and development unit of the Imperial Japanese Army that engaged in lethal human experimentation during the Second Sino-Japanese War and World War II. The unit operated from 1935 to 1945, with its main facility located in the Harbin area of the Japanese puppet state of Manchukuo.12

Unit 731 conducted horrific experiments on thousands of prisoners of war and civilians. These experiments included testing chemical and biological agents and vivisection to observe the effects. The unit's activities resulted in the deaths of countless individuals, and its members were granted immunity from prosecution by the United States in exchange for their research data. The atrocities committed by Unit 731 represent a grave violation of human rights and ethical principles.1

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3 Britannica Sources
  1. Empire of Japan - Manchukuo and the Second Sino-Japanese War
  2. Doolittle Raid
  3. casualties of World War II

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