WW2 Royal Navy King George V Class Battleships
Contains 5 ships:
https://en.wikipedia.org/wiki/King_George_V-class_battleship_(1939)
https://en.wikipedia.org/wiki/HMS_King_George_V_(41)
https://en.wikipedia.org/wiki/HMS_Prince_of_Wales_(53)
https://en.wikipedia.org/wiki/HMS_Duke_of_York_(17)
https://en.wikipedia.org/wiki/HMS_Anson_(79)
https://en.wikipedia.org/wiki/HMS_Howe_(32)