It chronicles the men of Lancashire who fought for their country during the wars. It also acts as an archive of battles fought by the Duke of Lancaster's Regiment and its antecedent regiments, including the Queen's Lancashire Regiment, the East Lancashire, South Lancashire, Loyal North Lancashire, and Lancashire (Prince of Wales's Volunteers) Regiments. In all, the museum's collections cover 120 separate units, including the 59 battalions formed by the antecedent Lancashire regiments during the First World War, and all associated Militia, Rifle Volunteers, Territorials, Home Guard and Cadet units.