In 1972 , the garrison was the site of one of the worst UK mainland IRA attacks of the time when a car bomb was detonated outside the headquarters mess of 16 Parachute Brigade . The Official IRA claimed responsibility , stating that the attack was in revenge for the shootings in Derry that came to be known as Bloody Sunday . At the time of the attack , Aldershot garrison was an entirely open garrison . Following the attack the Army took steps to secure the garrison by erecting security fences around most of the barracks and lines , as well as introducing armed security patrols
Bloody Sunday
Bloody Sunday (1972)
Aldershot Garrison