Allegations of biological warfare in the Korean War

Allegations that the United States military used biological weapons in the Korean War (June 1950 – July 1953) were raised by the governments of the People's Republic of China, the Soviet Union, and North Korea. The claims were first raised in 1951. The story was covered by the worldwide press and led to a highly publicized international investigation in 1952. Secretary of State Dean Acheson and other American and allied government officials denounced the allegations as a hoax. Subsequent scholars are split about the truth of the claims.