Moving the US to a war footing before and during the Second World War was probably the largest industrial shift in American history. In rural Wisconsin, the largest munition factory in the world sprung up as if out of nowhere, just one of many military facilities the size of cities built to help meet the needs of a global war.
There is legitimate controversy over which ship was America’s first true battleship. But the Navy answers that question relatively clearly- USS Indiana was, from the outset, called "Battleship Number One."