The Duke of Lancaster's Regiment (LANCS) is an infantry regiment of the line within the British Army, part of the King's Division. Headquartered in Preston, it recruits throughout the North West of England. The title of Duke of Lancaster merged with the Crown on the accession of Henry V in 1413 and remains dormant, subject to any future revival. Customarily, however, the Sovereign is referred to as the Duke of Lancaster within Lancashire and in relation to the Duchy of Lancaster, and is the regiment's Colonel in Chief. The Duke of Lancaster's Regiment is the county regiment for Cumbria, Lancashire, Greater Manchester, Merseyside and the Isle of Man, and as such, recruits mainly from these areas.

The Ranger Regiment is a special operations-capable unit of the British Army which was formed on 1 December 2021 under the Future Soldier reform and is part of the Army Special Operations Brigade. It is intended to be used primarily in an unconventional warfare and foreign internal defence capacity in a similar manner to the US Green Berets.