During World War II, which country had the largest battleship (measured by tonnage)? Britain, Germany, Japan, or the United States?

The largest battleships ever constructed belonged to the Imperial Japanese Navy. The sister ships Yamato and Musashi were true behemoths, displacing nearly 73,000 tons at full load. This incredible size was a deliberate strategy. Unable to match the industrial might of the United States ship for ship, Japan opted to build super-battleships that were individually superior to anything their adversaries could field, hoping they could win a single, decisive naval battle.

To put their scale into perspective, the largest American battleships of the war, the Iowa-class, were over 15,000 tons lighter, while Germany's famous Bismarck was smaller still. The Yamato-class vessels were armed with nine 18.1-inch guns, the most powerful naval artillery ever mounted on a warship, capable of firing enormous shells over 26 miles.

Despite their immense power, these battleships represented an era of naval warfare that was rapidly coming to an end. In a telling demonstration of the new reality of naval power, both the Musashi and the Yamato were sunk by overwhelming attacks from US carrier-based aircraft toward the end of the war. They never fought the decisive battleship duel they were designed for, instead becoming powerful symbols of the aircraft carrier's rise to supremacy on the high seas.