Design

The designers of dreadnoughts sought to provide as much protection, speed, and firepower as possible in a ship of a realistic size and cost. The hallmark of dreadnought battleships was an “all-big-gun” armament, but they also had heavy armor concentrated mainly in a thick belt at the waterline and in one or more armored decks. In addition, secondary armament, fire control, command equipment, protection against torpedoes also had to be crammed into the hull.[36]

The inevitable consequence of demands for ever greater speed, striking power, and endurance meant that displacement, and hence cost, of dreadnoughts tended to increase. The Washington Naval Treaty of 1922 imposed a limit of 35,000 tons on the displacement of capital ships. In subsequent years a number of treaty battleships were commissioned designed to build up to this limit. Japan’s decision to leave the Treaty in the 1930s, and the arrival of the Second World War, eventually made this limit irrelevant.[37]