History records that the most powerful battleship ever built was the Japanese Yamato-class. No battleship has been built since the 1940s. Now, the US sets a new record by introducing “the Trump-class super battleship”. It’s “the most lethal warship ever built,”The first ship, named USS Defiant (BBG-1), will lead what Trump calls the “Golden Fleet.” Each ship could cost 10 to $15 billion.