

This first generation, known as the " Dreadnoughts", came to be built in rapid succession in Europe, the Americas, and Japan with ever more tension growing between the major naval powers.

The commissioning and putting to sea of HMS Dreadnought, in part inspired by the results of the Battle of Tsushima in May 1905, marked the dawn of a new era in naval warfare and defining an entire generation of warships: the battleships. The term "battleship" first entered common parlance to describe certain types of ironclad warships in the 1880s, now referred to as pre-dreadnoughts. The importance placed on battleships also meant massive arms races between the great powers of the 20th century such as the United Kingdom, Germany, Japan, United States, France, Italy, Russia, and the Soviet Union. The battleship, as the might of a nation personified in a warship, played a vital role in the prestige, diplomacy, and military strategies of 20th century nations. Sunken battleships are the wrecks of large capital ships built from the 1880s to the mid-20th century that were either destroyed in battle, mined, deliberately destroyed in a weapons test, or scuttled. Red symbols sunken battleships, purple symbols denote battleships sunk as aircraft carriers, and stars denote more than one battleship in an area.
