The Military Reaction Force, Military Reconnaissance Force or Mobile Reconnaissance Force (MRF) was a covert intelligence-gathering and counter-insurgency unit of the British Army active in Northern Ireland during the Troubles. The unit was formed during the summer of 1971 and operated until late 1972 or early 1973. MRF teams operated in plain clothes and civilian vehicles, equipped with pistols and submachine guns. They were tasked with tracking down and arresting, or killing, members of the Provisional Irish Republican Army (IRA).