Dreadnaughts. surpassed? Well, yeah, sort of. Our own Iowa class boats would qualify as dreadnaughts and while they are parked they are still complete and serviceable. We just repainted the Jersey this year and one snotty move out of the Syrians and it’s Anchors Aweigh. The Kuwaitis remember.
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The Iowas are actually the next phase of battleship development, the fast battleship. Before WW1, battleship designers couldn’t build ships that had both speed and armor, so they built slow dreadnoughts with heavy armor and fast battlecruisers with light armor. In WW2, improvements in technology meant that one ship could be armored like a dreadnought, but have the speed of a battlecruiser.