In April 1942, sixteen American B-25 bombers lifted off from the deck of USS Hornet and struck the Japanese home islands in a raid that stunned the Empire of Japan. But for the Chinese people of Zhejiang and Jiangxi provinces, the Doolittle Raid triggered a catastrophe. In this episode of Shipwrecks and Sea Dogs, host Rich Napolitano examines the brutal Japanese military campaign that followed during a campaign of deliberate terror against civilian populations who had aided the American airmen. What unfolded was one of the most horrifying chapters of World War II in the Pacific: a systematic campaign of slaughter, rape, and the deliberate weaponization of disease against an unarmed population.

At the center of that horror was Unit 731, the Imperial Japanese Army's covert biological and chemical warfare research program. Operating under the cover of a public health unit, Unit 731 conducted lethal human experimentation on prisoners of war and civilians, developing plague, cholera, and typhoid as battlefield weapons. These weapons were deployed against Chinese towns and villages during the reprisal campaign.

Guest Jenny Chan of Pacific Atrocities education examines the documented record of these atrocities, the scale of the death toll, and the deeply troubling postwar decision by American authorities to grant Unit 731 scientists immunity from prosecution in exchange for their research data.

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This episode was written, edited, and produced by Rich Napolitano. Original theme music is by ⁠⁠⁠⁠⁠Sean Sigfried⁠⁠⁠⁠⁠.

**No AI was used during the production of this episode.**

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Shipwrecks and Sea Dogs is a maritime history podcast about shipwrecks, tragic loss, and incredible accomplishments on the world's oceans and waterways.

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