The Middlesex Militia was an auxiliary military force in the county of Middlesex in South East England. From their formal organisation as Trained Bands, in 1572 and their service during the Armada Crisis and in the English Civil War, the Militia regiments of Middlesex served during times of international tension and all of Britain's major wars. By 1853 there were five regiments in the county. They provided internal security and home defence but sometimes operated further afield, including France and the Mediterranean, relieving regular troops from routine garrison duties, and acting as a source of trained officers and men for the Regular Army. Some of the infantry battalions went on active service during the Second Boer War and all served as Special Reserve training units in World War I. A