History | Ancient History on Instagram: "During World War II, Japan’s notorious Unit 731, based in Harbin in northeastern China, carried out some of the most horrific human experiments in modern history under the guise of scientific research. Established by the Imperial Japanese Army in 1935 and commanded by General Shiro Ishii, the unit conducted gruesome biological and chemical warfare experiments on thousands of Chinese civilians and prisoners of war, as well as captured Russians and Koreans.