Original sentence: A truce in July 1921 brought hostilities to an end; the Anglo-Irish Treaty was signed on 6 December.In February 1922, the pro-treaty IRA became the  National Army of the Irish Free State.It ended in victory for the National Army when, on 24 May 1923, the anti-treaty IRA Chief of Staff, Frank Aiken ordered his volunteers to dump arms.The IRA divided between those who accepted the decision of the Dáil in ratifying the Treaty and those who did not: consequently, both civil war and re-occupation by the British became possible
Edited sentence: A residual IRA organisation, considering itself the legitimist successor of the original IRA (and thus directly challenging the authority of the National Army), carried on low-level paramilitary activities for several decades and eventually gave rise to various other organisations claiming the same name.A truce brought hostilities to an end on 11 July 1921 and the Anglo-Irish Treaty was signed on 6 December.In February 1922, the Provisional Government began to recruit volunteers into a new National Army.It ended on 24 May 1923 with the IRA Chief of Staff, Frank Aiken, ordering IRA volunteers to dump arms, and the new Irish Free State slipped into an uneasy peace.Many IRA men who fought in the War of Independence were dissatisfied with the treaty, and both civil war and reoccupation by the British became possible