Japan's enormous I-400-class subs were supposed to bring the fight to US shores, launching planes to drop bombs on American cities and bases during during World War II. But wartime shortages limited ...

Here’s What You Need to Know: Japan had grand visions of attacking coastal U.S. cities. Over 70 years ago, the Imperial Japanese Navy’s prized Sen Toku I-400-class submarine aircraft carriers were ...

At the time of World War II, American submarines were no longer than 312 feet with a beam of 27 feet. So, you can imagine America's surprise when two U.S. destroyers picked up a Japanese submarine on ...

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 ...