The 4th North Midland Brigade, sometimes known as the 'Derbyshire Howitzers', was a part-time unit of Britain's Royal Field Artillery created in 1908 as part of the Territorial Force. It served on the Western Front in World War I. Reorganised between the wars, it was later converted to the anti-aircraft (AA) role. During World War II, part of the regiment served in the Siege of Malta but the rest was captured at the Fall of Tobruk. The reconstituted regiment served on in Anti-Aircraft Command until 1955 and as a unit of the Royal Engineers until 1967.