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 Manchester Regiment was a line infantry regiment of the British Army in existence from 1881 until 1958. The regiment was created during the 1881 Childers Reforms by the amalgamation of the 63rd Regiment of Foot and the 96th Regiment of Foot as the 1st and 2nd battalions; the 6th Royal Lancashire Militia became the 3rd (Reserve) and 4th battalions and the Volunteer battalions became the 5th, 6th, 7th, 8th, 9th and 10th battalions.