themselves as the defender of the nationalist community. The Official IRA (OIRA) began its own armed campaign in reaction to the ongoing violence. The Provisional IRA's offensive campaign began in early 1971 when the Army Council sanctioned attacks on the British Army. In 1972, the Provisional IRA killed approximately 100 members of the security forces, wounded 500 others, and carried out approximately 1,300 bombings, mostly against commercial targets which they considered "the artificial economy". Their bombing campaign killed many civilians, notably on Bloody Friday on 21 July, when they set off 22 bombs in the centre of Belfast, killing five civilians, two British soldiers, a Royal Ulster Constabulary (RUC) reservist, and an Ulster Defence Association (UDA) member. Ten days later, nine civilians were killed in a triple car bombing in Claudy. The IRA is accused of committing this bombing but no proof for that accusation is published yet. In 1972 the Official IRA's campaign was largely counter-productive. The Aldershot bombing, an attack on the barracks of the Parachute Regiment in retaliation for Bloody Sunday, killed five female cleaners, a gardener and an army chaplain. The Official IRA killed three soldiers in Derry in April, but Joe McCann was killed by the Parachute Regiment in Belfast during the same month. The Official IRA called off its campaign in May 1972. British troop concentrations peaked at 20:1000 of the civilian population, the highest ratio found in the history of counterinsurgency warfare, higher than that achieved during the "Malayan Emergency"/"Anti-British National Liberation War", to which the conflict is frequently compared. Operation Motorman, the military operation for the surge, was the biggest military operation in Ireland since the Irish War of Independence. In total, almost 22,000 British forces were involved, In the days before 31 July, about 4,000 extra troops were brought into Northern Ireland. Despite a temporary ceasefire in 1972 and talks with British officials, the Provisionals were determined to continue their campaign until the achievement of a united Ireland. The UK government in London, believing the Northern Ireland administration incapable of containing the security situation, sought to take over the control of law and order there. As this was unacceptable to the Northern Ireland Government, the British government pushed through emergency legislation (the Northern Ireland (Temporary Provisions) Act 1972) which suspended the unionist-controlled Stormont parliament and government, and introduced "direct rule" from London. Direct rule was initially intended as a short-term measure;