The IRA and its splinter groups include: • Original IRA (the "old IRA") – fought in the
War of Independence 1919–1921 • That part of the IRA that accepted the compromise of the 1921 treaty which established the
Irish Free State and that became the initial Free State government. The pro-treaty faction of Sinn Féin led by
Arthur Griffith, Lachlan Lawrence and
Michael Collins shortly thereafter formed itself into the
Cumann na nGaedheal party under
W. T. Cosgrave. With additional recruits, its military supporters became the
National Army, later known as the
Irish Defence Forces. Cumann na nGaedheal merged with other groups in 1933 to form
Fine Gael Party, currently the third largest party in the
Republic of Ireland. • That part of the original IRA organised within
Northern Ireland not included within the Free State (see below). • That part of the IRA, organised within the twenty-six counties that became the Free State, which rejected the compromise of the 1921 treaty with Britain. Under
Liam Lynch, it fought the
Irish Civil War against the Free State's National Army (led by
Michael Collins), with the support of the anti-treaty faction of Sinn Féin led by
Éamon de Valera. • Some years after losing the Civil War a faction led by de Valera resigned from
Sinn Féin and established the
Fianna Fáil party in 1926, which is among the largest parties in the
Republic of Ireland. • In the 1930s, the remainder of the IRA, including that part of the Old IRA organised within Northern Ireland, attempted a
bombing campaign in Britain, a
campaign in Northern Ireland (after a change in leadership to the north) and
some military activities in the Free State (later the Republic of Ireland). After a period of poor relations, the symbiotic relationship between Sinn Féin and the IRA was re-established in the late 1930s. • By the 1960s, after the failed
border campaign, Sinn Féin moved towards a
Marxist class struggle outlook. With the outbreak of
the Troubles, Sinn Féin, or as it came to be called after the formation of the Provisional IRA and Provisional Sinn Féin,
Official IRA /
Official Sinn Féin, found itself sidelined because of its decision not to engage the British state militarily. Over time the Official IRA faded away, while Official Sinn Féin moved to a purely Marxist position, renaming itself first Sinn Féin the Workers Party, and then in 1982 the
Workers' Party. • After the Official IRA's 1972 ceasefire, it and Official Sinn Féin suffered a split in 1974 leading to the formation of the
far left Irish National Liberation Army (INLA) and
Irish Republican Socialist Party, led by
Seamus Costello (later assassinated by the Official IRA during a bloody feud). The INLA was known for a series of internal feuds and some of the more sectarian killings by
Irish nationalists. • In 1986, the
Irish People's Liberation Organisation split from the INLA. • In 1992, the Workers' Party suffered a split when a majority faction failed to secure changes. They left and formed the
Democratic Left. Ultimately, the Democratic Left merged into the
Labour Party. • In 1969, the more traditionalist republican members split off into the
Provisional IRA and
Sinn Féin. The Provisional IRA operated mostly in Northern Ireland, using violence against the
Royal Ulster Constabulary and the
British Army, and British institutions and economic targets. They also killed members of the Irish Army and the
Garda Síochána (the Republic's police force), which was against one of their
standing orders. • A further split occurred in 1986 when the former leader of Sinn Féin
Ruairí Ó Brádaigh – who was replaced by
Gerry Adams in 1983 – walked out of the Sinn Féin Ard Fheis after delegates voted to end the policy of
abstentionism from
Dáil Éireann. The followers of Ó Brádaigh, who adhere to
republican legitimatism and oppose Sinn Féin's decision to abandon abstentionism, set up a rival party and military wing called
Republican Sinn Féin and the
Continuity IRA. • In 2006, the
Irish Republican Liberation Army,
Óglaigh na hÉireann and
Saoirse na hÉireann split from the Continuity IRA. • In 1997, Members of the Provisional IRA who did not accept the peace process split off to form the
Real IRA. Its political wing is the
32 County Sovereignty Movement. • In 2009,
Óglaigh na hÉireann split from the Real IRA. • In 2012, the Real IRA merged with other republican groups including the
Republican Action Against Drugs (RAAD) to form the
New IRA. • In 2011, according to the
Belfast Telegraph, former members of the Provisional IRA announced a resumption of hostilities under the name "Irish Republican Army". ==See also==