List of IRAs
Encyclopedia
The IRA is a name used to describe several armed movements in Ireland
Ireland
Ireland is an island to the northwest of continental Europe. It is the third-largest island in Europe and the twentieth-largest island on Earth...

 in the 20th and 21st centuries, though the first known use of the term occurred in the Fenian raids
Fenian raids
Between 1866 and 1871, the Fenian raids of the Fenian Brotherhood who were based in the United States; on British army forts, customs posts and other targets in Canada, were fought to bring pressure on Britain to withdraw from Ireland. They divided many Catholic Irish-Canadians, many of whom were...

 on Canada in the 1860s.

All claim descent from the original Irish Republican Army
Irish Republican Army
The Irish Republican Army was an Irish republican revolutionary military organisation. It was descended from the Irish Volunteers, an organisation established on 25 November 1913 that staged the Easter Rising in April 1916...

, which was formed from the Irish Volunteers
Irish Volunteers
The Irish Volunteers was a military organisation established in 1913 by Irish nationalists. It was ostensibly formed in response to the formation of the Ulster Volunteers in 1912, and its declared primary aim was "to secure and maintain the rights and liberties common to the whole people of Ireland"...

. It was the army of the Irish Republic
Irish Republic
The Irish Republic was a revolutionary state that declared its independence from Great Britain in January 1919. It established a legislature , a government , a court system and a police force...

, declared by Dáil Éireann
Dáil Éireann
Dáil Éireann is the lower house, but principal chamber, of the Oireachtas , which also includes the President of Ireland and Seanad Éireann . It is directly elected at least once in every five years under the system of proportional representation by means of the single transferable vote...

 in 1919. Most Irish people dispute the claims of more recently created organizations 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
Brendan Behan
Brendan Francis Behan was an Irish poet, short story writer, novelist, and playwright who wrote in both Irish and English. He was also an Irish republican and a volunteer in the Irish Republican Army.-Early life:...

 once said that the first issue on any IRA agenda was "the split". For the IRA, that has constantly been the case. The first split came after the signature of the Anglo-Irish Treaty
Anglo-Irish Treaty
The Anglo-Irish Treaty , officially called the Articles of Agreement for a Treaty Between Great Britain and Ireland, was a treaty between the Government of the United Kingdom of Great Britain and Ireland and representatives of the secessionist Irish Republic that concluded the Irish War of...

 in 1921, with supporters of the Treaty forming the nucleus of the National Army
Irish Defence Forces
The armed forces of Ireland, known as the Defence Forces encompass the Army, Naval Service, Air Corps and Reserve Defence Force.The current Supreme Commander of the Irish Defence forces is His Excellency Michael D Higgins in his role as President of Ireland...

 while the anti-treaty forces continued to use the name Irish Republican Army. After the end of the Irish Civil War
Irish Civil War
The Irish Civil War was a conflict that accompanied the establishment of the Irish Free State as an entity independent from the United Kingdom within the British Empire....

, 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
Irish Republic
The Irish Republic was a revolutionary state that declared its independence from Great Britain in January 1919. It established a legislature , a government , a court system and a police force...

.
  • The original IRA
    Irish Republican Army
    The Irish Republican Army was an Irish republican revolutionary military organisation. It was descended from the Irish Volunteers, an organisation established on 25 November 1913 that staged the Easter Rising in April 1916...

     (in later years, known as the "Old" IRA), recognised by the First Dáil
    First Dáil
    The First Dáil was Dáil Éireann as it convened from 1919–1921. In 1919 candidates who had been elected in the Westminster elections of 1918 refused to recognise the Parliament of the United Kingdom and instead assembled as a unicameral, revolutionary parliament called "Dáil Éireann"...

     as the legitimate army of the Irish Republic in April 1921, split into pro-Treaty forces (the National Army, also known as the Government forces or the regulars) and anti-Treaty forces (the Republicans, irregulars or Executive forces) after the Treaty.
  • The Irish Republican Army (1922–1969)
    Irish Republican Army (1922–1969)
    The original Irish Republican Army fought a guerrilla war against British rule in Ireland in the Irish War of Independence 1919–1921. Following the signing of the Anglo-Irish Treaty on 6 December 1921, the IRA in the 26 counties that were to become the Irish Free State split between supporters and...

     - the anti-treaty IRA which fought and lost the civil war and which thereafter refused to recognise either the Irish Free State
    Irish Free State
    The Irish Free State was the state established as a Dominion on 6 December 1922 under the Anglo-Irish Treaty, signed by the British government and Irish representatives exactly twelve months beforehand...

     or Northern Ireland
    Northern Ireland
    Northern Ireland is one of the four countries of the United Kingdom. Situated in the north-east of the island of Ireland, it shares a border with the Republic of Ireland to the south and west...

    , deeming them both to be creations of British imperialism. It existed in one form or another for over 40 years before splitting in 1969.
  • The Official IRA
    Official IRA
    The Official Irish Republican Army or Official IRA is an Irish republican paramilitary group whose goal was to create a "32-county workers' republic" in Ireland. It emerged from a split in the Irish Republican Army in December 1969, shortly after the beginning of "The Troubles"...

     (OIRA), the remainder of the IRA after the 1969 split with the Provisionals; led by Cathal Goulding and primarily Marxist in its political orientation. It is now inactive in the military sense, while its political wing, Official Sinn Féin, became the Workers' Party of Ireland
    Workers' Party of Ireland
    The Workers' Party is a left-wing republican political party in Ireland. Originating in the Sinn Féin organisation founded in 1905 by Arthur Griffith, it took its current form in 1970 after a split within the party, adopting its current name in 1982....

    .
  • The Provisional IRA
    Provisional Irish Republican Army
    The Provisional Irish Republican Army is an Irish republican paramilitary organisation whose aim was to remove Northern Ireland from the United Kingdom and bring about a socialist republic within a united Ireland by force of arms and political persuasion...

     (PIRA), which broke from the OIRA in 1969 over the latter's failing to protect Catholic communities in Northern Ireland
    Northern Ireland
    Northern Ireland is one of the four countries of the United Kingdom. Situated in the north-east of the island of Ireland, it shares a border with the Republic of Ireland to the south and west...

    . Though strongly opposed to the OIRA's Marxism, it also has a left-wing orientation and increasing political activity. Since the decline of the OIRA in the mid 1970s, the term 'IRA' (without qualifiers) is now used exclusively to denote this particular group.
  • The Continuity IRA
    Continuity Irish Republican Army
    The Continuity Irish Republican Army, otherwise known as the Continuity IRA and styling itself as Óglaigh na hÉireann, is an Irish republican paramilitary organisation that aims to bring about a united Ireland. It emerged from a split in the Provisional IRA in 1986 but did not become active until...

     (CIRA), broke from the PIRA in 1986 because the latter ended its policy on abstentionism
    Abstentionism
    Abstentionism is standing for election to a deliberative assembly while refusing to take up any seats won or otherwise participate in the assembly's business. Abstentionism differs from an election boycott in that abstentionists participate in the election itself...

     (thus recognising the authority of the Republic of Ireland
    Republic of Ireland
    Ireland , described as the Republic of Ireland , is a sovereign state in Europe occupying approximately five-sixths of the island of the same name. Its capital is Dublin. Ireland, which had a population of 4.58 million in 2011, is a constitutional republic governed as a parliamentary democracy,...

    ).
  • The Real IRA
    Real Irish Republican Army
    The Real Irish Republican Army, otherwise known as the Real IRA , and styling itself as Óglaigh na hÉireann , is an Irish republican paramilitary organisation which aims to bring about a united Ireland...

     (RIRA), a 1997 breakaway from the PIRA consisting of members opposed to the peace process
    Northern Ireland peace process
    The peace process, when discussing the history of Northern Ireland, is often considered to cover the events leading up to the 1994 Provisional Irish Republican Army ceasefire, the end of most of the violence of the Troubles, the Belfast Agreement, and subsequent political developments.-Towards a...

    .
  • In April 2011, former members of the Provisional IRA announced a resumption of hostilities, and that "they had now taken on the mantle of the mainstream IRA." They further claimed "We continue to do so under the name of the Irish Republican Army. We are the IRA." and insisted that they "were entirely separate from the Real IRA, Oglaigh na hEireann (ONH), and the Continuity IRA." They claimed responsibility for the April killing of PSNI
    Police Service of Northern Ireland
    The Police Service of Northern Ireland is the police force that serves Northern Ireland. It is the successor to the Royal Ulster Constabulary which, in turn, was the successor to the Royal Irish Constabulary in Northern Ireland....

     constable Ronan Kerr as well as responsibility for other attacks that had previously been claimed by the Real IRA and ONH.

Genealogy of the IRA and its splits

Here in more detail is a representation of a genealogical tree of Irish nationalist movements derived from the original IRA:
  • Original IRA (the "old" IRA) - fought in the War of Independence 1919-1921
    • That part of the Old IRA that accepted the compromise of the 1921 treaty which established the Irish Free State
      Irish Free State
      The Irish Free State was the state established as a Dominion on 6 December 1922 under the Anglo-Irish Treaty, signed by the British government and Irish representatives exactly twelve months beforehand...

       and that became the initial Free State government. Its supporters became the modern-day Fine Gael Party, currently the largest party in Ireland. With additional recruits, it became the National Army, later known as the Irish Defence Forces
      Irish Defence Forces
      The armed forces of Ireland, known as the Defence Forces encompass the Army, Naval Service, Air Corps and Reserve Defence Force.The current Supreme Commander of the Irish Defence forces is His Excellency Michael D Higgins in his role as President of Ireland...

    • That part of the original IRA organised within Northern Ireland
      Northern Ireland
      Northern Ireland is one of the four countries of the United Kingdom. Situated in the north-east of the island of Ireland, it shares a border with the Republic of Ireland to the south and west...

       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 and under Liam Lynch
      Liam Lynch (general)
      Liam Lynch was an officer in the Irish Republican Army during the Irish War of Independence and the commanding general of the anti-Treaty Irish Republican Army during the Irish Civil War.-Early life:...

       fought the Irish Civil War
      Irish Civil War
      The Irish Civil War was a conflict that accompanied the establishment of the Irish Free State as an entity independent from the United Kingdom within the British Empire....

       against the Free State 'National Army' (led by Michael Collins
      Michael Collins (Irish leader)
      Michael "Mick" Collins was an Irish revolutionary leader, Minister for Finance and Teachta Dála for Cork South in the First Dáil of 1919, Director of Intelligence for the IRA, and member of the Irish delegation during the Anglo-Irish Treaty negotiations. Subsequently, he was both Chairman of the...

      ), with the support of the anti-treaty faction of Sinn Féin, led by Éamon de Valera
      Éamon de Valera
      Éamon de Valera was one of the dominant political figures in twentieth century Ireland, serving as head of government of the Irish Free State and head of government and head of state of Ireland...

      .
      • Fianna Fáil - some years after losing the Civil War a faction led by de Valera resigned from Sinn Féin and established the Fianna Fáil
        Fianna Fáil
        Fianna Fáil – The Republican Party , more commonly known as Fianna Fáil is a centrist political party in the Republic of Ireland, founded on 23 March 1926. Fianna Fáil's name is traditionally translated into English as Soldiers of Destiny, although a more accurate rendition would be Warriors of Fál...

         party, which is currently the third-largest party in Ireland. (In December 2007, Fianna Fáil was officially registered as a political party in Northern Ireland).
      • In the 1930s the remainder of the IRA, including that part of the Old IRA organised within Northern Ireland
        Northern Ireland
        Northern Ireland is one of the four countries of the United Kingdom. Situated in the north-east of the island of Ireland, it shares a border with the Republic of Ireland to the south and west...

        , attempted a bombing campaign in Britain
        S-Plan
        The S-Plan or Sabotage Campaign or England Campaign was a campaign of bombing and sabotage against the civil, economic, and military infrastructure of the United Kingdom from 1939 to 1940, conducted by members of the Irish Republican Army . It was conceived by Seamus O'Donovan in 1938 at the...

        , a campaign in Northern Ireland
        Northern Campaign (IRA)
        Northern Campaign is a term used to describe attacks involving volunteers of the Irish Republican Army during the Second World War between September 1942 and December 1944. It was a plan conceived by the then IRA Northern Command to launch attacks within Northern Ireland during this period...

         (after a shift in leadership to the north) and some military activities
        Christmas Raid
        The term Christmas Raid is a name used within the folklore of the Irish Republican Army to describe a raid in the Republic of Ireland against the Irish Army, and the theft of a huge quantity of weapons and munitions from an Irish Army ammunition Magazine Fort storage depot in Dublin's Phoenix...

         in the Free State (later the Republic of Ireland
        Republic of Ireland
        Ireland , described as the Republic of Ireland , is a sovereign state in Europe occupying approximately five-sixths of the island of the same name. Its capital is Dublin. Ireland, which had a population of 4.58 million in 2011, is a constitutional republic governed as a parliamentary democracy,...

        ). The World War II
        World War II
        World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

         period also saw attempts to gain financial and military support from Nazi Germany
        Nazi Germany
        Nazi Germany , also known as the Third Reich , but officially called German Reich from 1933 to 1943 and Greater German Reich from 26 June 1943 onward, is the name commonly used to refer to the state of Germany from 1933 to 1945, when it was a totalitarian dictatorship ruled by...

         and German Intelligence
        Abwehr
        The Abwehr was a German military intelligence organisation from 1921 to 1944. The term Abwehr was used as a concession to Allied demands that Germany's post-World War I intelligence activities be for "defensive" purposes only...

        . 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
          Border Campaign (IRA)
          The Border Campaign was a campaign of guerrilla warfare carried out by the Irish Republican Army against targets in Northern Ireland, with the aim of overthrowing British rule there and creating a united Ireland.Popularly referred to as the Border Campaign, it was also referred to as the...

          , Sinn Féin
          Sinn Féin
          Sinn Féin is a left wing, Irish republican political party in Ireland. The name is Irish for "ourselves" or "we ourselves", although it is frequently mistranslated as "ourselves alone". Originating in the Sinn Féin organisation founded in 1905 by Arthur Griffith, it took its current form in 1970...

           moved towards a Marxist class struggle
          Class struggle
          Class struggle is the active expression of a class conflict looked at from any kind of socialist perspective. Karl Marx and Friedrich Engels wrote "The [written] history of all hitherto existing society is the history of class struggle"....

           outlook. With the outbreak of the Troubles
          The Troubles
          The Troubles was a period of ethno-political conflict in Northern Ireland which spilled over at various times into England, the Republic of Ireland, and mainland Europe. The duration of the Troubles is conventionally dated from the late 1960s and considered by many to have ended with the Belfast...

           Sinn Féin, or as it came to be called after the formation of the Provisional IRA and Provisional Sinn Féin, Official IRA
          Official IRA
          The Official Irish Republican Army or Official IRA is an Irish republican paramilitary group whose goal was to create a "32-county workers' republic" in Ireland. It emerged from a split in the Irish Republican Army in December 1969, shortly after the beginning of "The Troubles"...

          / Official Sinn Féin found itself sidelined because of its decision not to engage in aggressive warfare against the British state. 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 The Workers' Party
          Workers' Party of Ireland
          The Workers' Party is a left-wing republican political party in Ireland. Originating in the Sinn Féin organisation founded in 1905 by Arthur Griffith, it took its current form in 1970 after a split within the party, adopting its current name in 1982....

          .
          • After the Official IRA's 1972 ceasefire it and Official Sinn Féin suffered a split in 1974 leading to the formation of the extreme left wing Irish National Liberation Army
            Irish National Liberation Army
            The Irish National Liberation Army or INLA is an Irish republican socialist paramilitary group that was formed on 8 December 1974. Its goal is to remove Northern Ireland from the United Kingdom and create a socialist united Ireland....

            (INLA) and the Irish Republican Socialist Party
            Irish Republican Socialist Party
            The Irish Republican Socialist Party or IRSP is a republican socialist party active in Ireland. It claims the legacy of socialist revolutionary James Connolly, who founded the Irish Socialist Republican Party in 1896 and was executed after the Easter Rising of 1916.- History :The Irish Republican...

            , led by Seamus Costello
            Seamus Costello
            Seamus Costello was a leader of Official Sinn Féin and the Official Irish Republican Army and latterly of the Irish Republican Socialist Party and the Irish National Liberation Army ....

             (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 from the nationalist side.
            • In 1987, the Irish People's Liberation Organisation
              Irish People's Liberation Organisation
              The Irish People's Liberation Organisation was a small Irish republican paramilitary organization which was formed in 1986 by disaffected and expelled members of the Irish National Liberation Army whose factions coalesced in the aftermath of the supergrass trials...

              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
            Democratic Left (Ireland)
            Democratic Left was a democratic socialist political party active in Ireland between 1992 and 1999. It came into being after a split in the Workers' Party and, after just seven years in existence, it merged into the Irish Labour Party.-Origins:...

            the most leftist of the parties in the Republic with seats in the Dáil Éireann
            Dáil Éireann
            Dáil Éireann is the lower house, but principal chamber, of the Oireachtas , which also includes the President of Ireland and Seanad Éireann . It is directly elected at least once in every five years under the system of proportional representation by means of the single transferable vote...

             (though also operating in Northern Ireland
            Northern Ireland
            Northern Ireland is one of the four countries of the United Kingdom. Situated in the north-east of the island of Ireland, it shares a border with the Republic of Ireland to the south and west...

            ). Ultimately the Democratic Left merged into the Labour Party.
        • In 1969, the more traditionalist republican members split off into the Provisional IRA and Provisional Sinn Féin. The Provisional IRA operated mostly in Northern Ireland, using violence against the Royal Ulster Constabulary
          Royal Ulster Constabulary
          The Royal Ulster Constabulary was the name of the police force in Northern Ireland from 1922 to 2000. Following the awarding of the George Cross in 2000, it was subsequently known as the Royal Ulster Constabulary GC. It was founded on 1 June 1922 out of the Royal Irish Constabulary...

           and the British army
          British Army
          The British Army is the land warfare branch of Her Majesty's Armed Forces in the United Kingdom. It came into being with the unification of the Kingdom of England and Scotland into the Kingdom of Great Britain in 1707. The new British Army incorporated Regiments that had already existed in England...

          , and British institutions and economic targets. They also killed members of the Irish army and the Garda Síochána
          Garda Síochána
          , more commonly referred to as the Gardaí , is the police force of Ireland. The service is headed by the Commissioner who is appointed by the Irish Government. Its headquarters are located in the Phoenix Park in Dublin.- Terminology :...

           (the Irish police force), which was against one of their standing order
          General order
          In militaries, a general order is a published directive, originated by a commander, and binding upon all personnel under his command, the purpose of which is to enforce a policy or procedure unique to his unit's situation which is not otherwise addressed in applicable service regulations, military...

          s.
          • A further split occurred in 1986, when the former leader of Sinn Féin Ruairí Ó Brádaigh
            Ruairí Ó Brádaigh
            Ruairí Ó Brádaigh is an Irish republican. He is a former chief of staff of the Irish Republican Army , former president of Sinn Féin and former president of Republican Sinn Féin.-Early life:...

             - who was replaced by Gerry Adams
            Gerry Adams
            Gerry Adams is an Irish republican politician and Teachta Dála for the constituency of Louth. From 1983 to 1992 and from 1997 to 2011, he was an abstentionist Westminster Member of Parliament for Belfast West. He is the president of Sinn Féin, the second largest political party in Northern...

             in 1983 - walked out of the Sinn Féin Ard fheis after delegates voted to end the policy of abstentionism to Leinster House. The followers of Ruairí Ó Brádaigh, who adhere to republican legitimatism
            Irish republican legitimatism
            A concept within Irish republicanism, Irish republican legitimatism denies the legitimacy of the political entities of Republic of Ireland and Northern Ireland and posits that the pre-partition Irish Republic continues to exist...

            , and opposing Sinn Féin's decision to abandon abstentionism
            Abstentionism
            Abstentionism is standing for election to a deliberative assembly while refusing to take up any seats won or otherwise participate in the assembly's business. Abstentionism differs from an election boycott in that abstentionists participate in the election itself...

             and enter Dáil Éireann
            Dáil Éireann
            Dáil Éireann is the lower house, but principal chamber, of the Oireachtas , which also includes the President of Ireland and Seanad Éireann . It is directly elected at least once in every five years under the system of proportional representation by means of the single transferable vote...

            , set up a rival party and military wing, called Republican Sinn Féin
            Republican Sinn Féin
            Republican Sinn Féin or RSF is an unregisteredAlthough an active movement, RSF is not registered as a political party in either Northern Ireland or the Republic of Ireland. minor political party operating in Ireland. It emerged in 1986 as a result of a split in Sinn Féin...

            and the Continuity IRA.
            • In 2006, the Irish Republican Liberation Army
              Irish Republican Liberation Army
              The Irish Republican Liberation Army is an Irish paramilitary "self-styled vigilante group" in support of a united Ireland. Although much of its origins are as of yet unknown, the IRLA had attracted attention with its threats of paramilitary action....

              split from the Continuity IRA.
            • In 2006, Óglaigh na hÉireann
              Óglaigh na hÉireann (CIRA splinter group)
              Óglaigh na hÉireann was the title taken by a small dissident republican paramilitary group that formed in 2006 as a splinter group from the Continuity IRA. According to Martyn Frampton this faction has ceased operations since 2009...

              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
            Real Irish Republican Army
            The Real Irish Republican Army, otherwise known as the Real IRA , and styling itself as Óglaigh na hÉireann , is an Irish republican paramilitary organisation which aims to bring about a united Ireland...

            . Its political wing is the 32 County Sovereignty Movement
            32 County Sovereignty Movement
            The 32 County Sovereignty Movement, often abbreviated to 32CSM or 32csm, is an Irish republican political organisation.The 32CSM's objectives are:* "The restoration of Irish national sovereignty"....

            .
            • In 2009, Óglaigh na hÉireann
              Óglaigh na hÉireann (Real IRA splinter group)
              Óglaigh na hÉireann is the title taken by a small dissident Irish republican paramilitary that formed in 2009 as a faction within the Real Irish Republican Army, although it claims to be independent of the Real IRA...

              split from the Real IRA.
          • In 2011 former members of the Provisional IRA announced a resumption of hostilities, under the name "Irish Republican Army".
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