9. H Class battleships
Like the carriers, the H Class boats would’ve been the largest battleships at sea. The 1,100-foot monsters would’ve been fitted with up to 20" (in diameter) cannons that dwarfed even the largest on the Japanese Yamato, which in turn, outsized anything in Uncle Sam’s arsenal. With a range of nearly 20,000 miles, there’s literally nowhere on Earth where they wouldn’t have been a threat.
To put the sheer size into perspective, this image is a rendering of an H44 Battleship next to the legendary Bismarck’s sister ship.