The Irish Republican Army (IRA) is any of several armed movements in Ireland

The first known use of the term "Irish Republican Army" occurred in the Fenian raids on many British landmarks, towns, and forts in the late 1700s and 1860s.[1] The original Irish Republican Army formed by 1917 from those Irish Volunteers who refused to enlist in the British Army during World War I, members of the Irish Citizen Army and others. During the Irish War of Independence it was the army of the Irish Republic, declared by Dáil Éireann in 1919. Some Irish people dispute the claims of more recently created organisations that insist that they are the only legitimate descendants of the original IRA, often referred to as the "Old IRA". The playwright and former IRA member Brendan Behan once said that the first issue on any IRA agenda was "the split".[2] For the IRA, that has often been the case. The first split came after the Anglo-Irish Treaty in 1921, with supporters of the Treaty forming the nucleus of the National Army of the newly created Irish Free State, while the anti-treaty forces continued to use the name Irish Republican Army. After the end of the Irish Civil War, the IRA was around in one form or another for forty years, when it split into the Official IRA and the Provisional IRA in 1969. The latter then had its own breakaways, namely the Real IRA and the Continuity IRA, each claiming to be the true successor of the Army of the Irish Republic.