When was the group attacked in the attack on the Four Square Laundry formed?
Attack on the Four Square Laundry: The Attack on the Four Square Laundry was a Provisional IRA ambush in the Twinbrook area of Belfast against a special British Military unit known as the Military Reaction Force. Military Reaction Force:  The unit was formed during the summer of 1971 and operated until late 1972 or early 1973.
summer of 1971