The 1st Denbighshire Rifle Volunteers, later 4th (Denbighshire) Battalion, Royal Welch Fusiliers, was a Welsh unit of the British Army's auxiliary forces. First raised in 1860, it served as a pioneer battalion with the 47th (2nd London) Division on the Western Front during World War I and with the 53rd (Welsh) Division in North West Europe during World War II. It continued in the postwar Territorial Army through a series of mergers until finally amalgamating with another Welsh battalion in 1999.
