The term 'pre-dreadnought' was applied in retrospect, to describe the capital ships built during the decade and a half before the launch of HMS Dreadnought in 1906. At that moment these once great warships were rendered obsolete. However, until then, they were simply called 'battleships' and were unquestionably the most powerful warships of their day. These mighty warships represented the cutting edge of naval technology. The ugly ducklings of the ironclad era had been transformed into beautiful swans, albeit deadly ones.