Complex sentence: The barracks were established on Hamiltonsbawn Road in Armagh in 1975 as a base for 2nd Battalion, Ulster Defence Regiment during the Troubles and then became Headquarters for 3rd Infantry Brigade in February 1988.
Split into simpler sentences: The barracks were established on Hamiltonsbawn Road in Armagh in 1975. During the Troubles they became a base for 2nd Battalion, Ulster Defence Regiment and then became headquarters for 3rd Infantry Brigade from February 1988.