In the 1970s, 1980s, and 1990s, the area was a major centre of civil disturbances during the social-political conflict known as The Troubles. A large British army fort – known as Silver City - was built in the central Broom Hill part of Andersonstown. There was generally less strife than in, for instance, neighbouring districts such as Lenadoon, which in 1972 saw clashes between the IRA and Ulster Defence Association and a subsequent demographic shift in the estate from Protestant to Catholic, and Ballymurphy, the scene of the Ballymurphy massacre and Springhill massacre.