What was the name of the notorious biological research unit of the Japanese Army that undertook lethal human experimentation during the Second Sino-Japanese War (1937-1945) and WWII?
Organization of the Imperial Japanese Army size below division. Cavalry units were formed in regiments most were either operating attached to infantry divisions or directly under a brigade attached to an army prior to the formation of the IJA Cavalry Group on 21 April 1933. There were three cavalry brigades: the IJA 1st Cavalry Brigade, IJA 3rd Cavalry Brigade, and IJA 4th Cavalry Brigade. Unit 731 were covert medical experiment units which conducted biological warfare research and development through human experimentation during the Second Sino-Japanese War (1937–1945) and World War II. Unit 731 responsible for some of the most notorious war crimes. Initially set up as
Combatants of the Second Sino-Japanese War Combatants of the Second Sino-Japanese War The Second Sino-Japanese War was fought between 1937 and 1945, involving the military forces of the China and Japan. With Chiang Kai-shek as the highest commander, the NRA is recognized as the unified armed force of China during the war. Throughout its lifespan, it employed approximately 4,300,000 regulars, in 370 Standard Divisions (), 46 New Divisions (), 12 Cavalry Divisions (), eight New Cavalry Divisions (), 66 Temporary Divisions (), and 13 Reserve Divisions (), for a grand total of 515 divisions. However, many divisions were formed from two or more other divisions, and