Montana-Class Battleships were only planned for the United States Navy. Construction was canceled before it began. There were 5 intended to be built. 

United States Navy place the order in May 1942, the entire Montana class was suspended in June 1942.

Preceded by: Iowa-class battleship

Succeeded by: N/A

The Montana-Class Battleship was designed to withstand the firepower of her own guns. The 16″/50 cannon when coupled with the “super heavy” 2700lb shell could have been by far the finest battleship gun ever to see service. At long ranges, its penetration power was almost that of the larger Japanese18.1″ shell. Due to this similarity, the fact that the Montana was so well protected was really a happy accident.