The submarines were a part of the Japanese Sen Toku I-400-class submarine, which could have easily been two of the most legendary submarines of WW2. Unlike Japan's dwarf submarines of World War II ...

Japan began construction of the 5,223-ton I-400 class of submarine aircraft carrier. Designed for attacks against the Panama Canal and the U.S. west coast, each carried three dive-bomber seaplanes.

The Japanese submarine I-400 after her surrender to the United States. Note the large cylindrical hangar alongside the conning tower and the catapult forward. These giant submarines each carried ...

The Nazi betrayal of the Soviet Union during World War II caught Moscow completely off guard. In a desperate attempt at staving off the Nazi advance into their territory, the Soviets strapped dogs ...

Later the Americans learned the truth: The chamber was actually a hanger, and the two vessels were I-400-class submarine aircraft carriers — one of the Japanese Empire's greatest secret weapons.