Irish Republican Army


The Irish Republican Army is a name used by various paramilitary organisations in Ireland throughout the 20th and the 21st centuries. The late twentieth century organisation is known as the Provisional Irish Republican Army. The political movement in total is dedicated to irredentism through Irish republicanism, the belief that all of Ireland should be an independent republic free from British rule. The original Irish Republican Army formed in 1917 from those Irish Volunteers who did not enlist in the British Army during World War I, members of the Irish Citizen Army and others. Their ranks were reinforced by Irishmen, formerly in the British Army in World War I, who returned to Ireland to fight against Britain in the Irish War of Independence. In Irish law, this IRA was the army of the Irish Republic as 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 Irish organisation's agenda was "the split". 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.
Here in more detail is a representation of a genealogical tree of Irish nationalist movements derived from the original IRA: