 Support for the IRA increased further after Bloody Sunday in January 1972 , when thirteen unarmed men and boys were shot dead by the British Army 's Parachute Regiment at a march in the Bogside ( a 14th man was wounded and died 4 ½ months later ) . The support began to wane after the killing by the Official IRA of a local youth who was home on leave from the British Army . After a Provisional IRA ceasefire , during which it entered talks with the British government , broke down , the British took the decision to move against the " no @-@ go " areas . Free Derry came to an end on 31 July 1972 , when thousands of British troops moved in with armoured cars and bulldozers to occupy the area . 
 Support for the IRA<a href='been_done' title='1'><mark></mark></a> increased further after Bloody Sunday in January 1972 , when thirteen unarmed men and boys <a href='uninflect' title='2'><mark>were</mark></a> shot dead by the British Army <a href='null_genetive' title='3'><mark>'s</mark></a>Parachute Regiment at a march in the Bogside ( a 14th man was wounded and died 4 ½ months later ) . The support began to wane after the killing by the Official IRA of a local youth <a href='null_relcl' title='4'><mark>who</mark></a>was home on leave from the British Army . After a Provisional IRA ceasefire , during which it entered talks with the British government , broke down , the British took the decision to move against the " no @-@ go " areas . Free Derry came to an end on 31 July 1972 , when thousands of British troops moved in with armoured cars and bulldozers to occupy the area . 
Support for the IRA done increased further after Bloody Sunday in January 1972 , when thirteen unarmed men and boyz was shot dead by the British Army  Parachute Regiment at a march in da Bogside ( a 14th man was wounded and died 4 ½ months later ) . Tdasupport began to wane after thdailling by thedaficial IRA of a local youth was home on leave from the datish Army . After a Provisional IRA ceasefire , during which it entered talks w/ the Bdaish government , broke down , the British took the dedaion to move against the " no @-@ go " areas . Free Derry came to an end on 31 July 1972 , when thousands of British troops moved in with armoured cars and bulldozers to occupy the areda