Dark Seas Official on MSN

Japan’s I-400 plan - The submarines built to hit the Panama Canal

After Pearl Harbor, Admiral Isoroku Yamamoto pushed for aircraft-carrying submarines designed to strike far from Japan. The I-400 series was built to travel enormous distances and launch bombers from ...
Dark Seas Official on MSN

I-400 - Japan’s plague sub plan to strike San Diego

Late in the war, elements of Japan’s naval leadership explored a biological attack on the US mainland built around Unit 731’s plague research and methods used in China, including fleas infected with ...