Title: Factories of death
Subjects: Biological warfare, History, Japan, Japan. Rikugun. Kantōgun. Butai, Dai 731, Military relations, Sino-Japanese Conflict, 1937-1945, Sino-japanese war, 1937-1945, World war, 1939-1945, japan, World war, 1939-1945, united states
Places: China, Japan, Manchuria, Manchuria (China), United States
Time periods: 1931-1945