The Royal East Middlesex Militia was an auxiliary regiment reorganised in Middlesex in the Home counties of England during the 18th Century from earlier precursor units. It later became part of the Middlesex Regiment. Primarily intended for home defence, it saw action in the Second Boer War. It was converted to the Special Reserve under the Haldane Reforms and supplied reinforcements to the Middlesex Regiment's fighting battalions during World War I. After a shadowy postwar existence the unit was finally disbanded in 1953.