at the patrol. 8 August 1971: a British soldier (Malcolm Hatton, aged 21) was shot dead in an IRA sniper attack while on foot patrol, Brompton Park, Ardoyne, Belfast. The IRA claimed he was shot in retaliation for the shooting death of a civilian by the British Army the day before on the Springfield Road. 9 August 1971: 343 suspects were detained as internment was introduced (see Operation Demetrius). In the following two days 17 people were killed in gun battles between the IRA and British Army. The IRA killed two British soldiers (one of them UDR) while the British Army shot dead one IRA volunteer and 14 civilians. Between 1971–75, 1,981 people were interned; 1,874 were Catholic and 107 were Protestant. 9 August 1971: a UDR soldier (Winston Donnell, aged 22), was killed in a joint Provisional and Official IRA ambush at a vehicle check point in Clady, County Tyrone. 10 August 1971: Norman Watson, a Protestant civilian, was killed in the crossfire between the IRA and soldiers in Armagh. 10 August 1971: Paul Challoner (aged 23), a British soldier, was shot dead by the IRA while on foot patrol, Bligh's Lane, Creggan, Derry. 11 August 1971: an IRA volunteer (Seamus Simpson, aged 21), was shot dead while throwing a bomb at a British Army foot patrol, Rossnareen Avenue, Andersonstown, Belfast. 16 August 1971: the commander of the Provisionals' Belfast Brigade, Joe Cahill, gave a press conference claiming only 30 IRA volunteers had been interned. 18 August 1971: an IRA volunteer (Eamon Lafferty, aged 20) was shot dead during a gun battle between the IRA and the British Army in Kildrum Gardens, Creggan, Derry City. 23 August 1971: a British soldier (George Crozier, aged 23) was shot dead by an IRA sniper on Flax Street, Ardoyne, Belfast. The soldier was shot in the head as he exited a British armoured vehicle. 25 August 1971: a Protestant civilian (Henry Beggs, aged 23) was killed when the IRA bombed the Northern Ireland Electricity office on the Malone Road, Belfast. An inadequate warning was given. 29 August 1971: Battle of Courtbane, a British soldier (Ian Armstrong, aged 33) was shot dead by an IRA sniper near Crossmaglen, County Armagh. The soldier was travelling in a patrol consisting of two armoured Ferret Scout cars which inadvertently crossed the Irish border into County Louth near the village of Courtbane. While attempting to retreat back