Cornet was originally the lowest grade of commissioned officer in a British cavalry troop; the modern equivalent being a second lieutenant. The rank was abolished by the 1871 Cardwell Reforms, which replaced them with sub-lieutenant. Although obsolete, the term is still used as an internal title of address when referring to a second lieutenant within the British Army regiments of the Blues and Royals and Queen's Royal Hussars. The cornet rank was also used in by other nations such as the Imperial Russian Army and the Prussians.