Kaimingjie germ weapon attack

Event in Second Sino-Japanese War

The Kaimingjie germ weapon attack was a secret biological warfare launched by Japan in October 1940 against the Kaiming Street area of Ningbo, Zhejiang, China. A joint operation of the Imperial Japanese Army's Unit 731 and Unit 1644, this attack was operated by military planes taking off from Jianqiao Airport in Hangzhou,which airdropped wheat, corn, cotton scraps, and sand infected with plague fleas to target locations. From September 1940, Ningbo, Quzhou, and other places were subjected to various forms of biological warfares until the end of October 1940, when the attacks triggered a plague epidemic in Ningbo.

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