Round vignette with image of Dreadnought on background with map and symbolism of Great Britain. The dreadnought was the predominant type of 20th-century battleship. The first of the kind, the Royal Navy's Dreadnought had such an impact when launched in 1906 that battleships built after her were referred to as 'dreadnoughts', and earlier battleships became known as pre-dreadnoughts. Her design h