that I feel are interesting enough to share with you, dear reader. The USS America is not a battleship in the strictest sense, but it is the United State’s largest modern amphibious assault ship/helicopter carrier. There is no shortage of ludicrously massive warships that existed in only the darkest corners of the imagination and a few sheaves of paper. The interwar system of naval treaties allowed the United States to restart battleship construction in the late 1930s. This modern warship was launched on June 4, 2012 and officially commissioned in 2014. This was the largest battleship ever planned but never built In the days before naval aviation and submarines, the battleship was the unchallenged king of the seas. The 5 Most Lethal Battleships That Never Set Sail. However, I have chosen one (or six?) The H Class German battleships proposed were the largest designed. These could have been the ultimate ships on the high seas at the time...but they never made it out into the open oceans. 1131 ft long, 144,000 tons. The WWII-era Japanese Yamato was the biggest battleship ever made, displacing 71,659 tonnes and stretching 256 meters, but the proposed Nazi Schlachtschiff H-44 would have dwarfed it. The USS America is the first of a total of four ships planned for the America Class.