The heavy cruiser was designed for long range, high speed, and heavy calibre naval guns. The first heavy cruisers were built in 1915, although it only became a widespread classification following the London Naval Treaty in 1930. The heavy cruiser's immediate precursors were the light cruiser designs of the 1910s and 1920s; the US 8-inch 'treaty cruisers' of the 1920s were originally classed as light cruisers until the London Treaty forced their redesignation. Heavy cruisers continued in use until after World War II. Click on headers to sort column alphabetically.