Owen Martin O'Hagan was a former member of an army which emerged in what year?
Official Irish Republican Army The Official Irish Republican Army or Official IRA (OIRA) was an Irish republican paramilitary group whose goal was to remove Northern Ireland from the United Kingdom and create a "workers' republic" encompassing all of Ireland. It emerged in December 1969, shortly after the beginning of the Troubles, when the Irish Republican Army split into two factions. The other was the Provisional IRA. Each continued to call itself simply "the IRA" and rejected the other's legitimacy. Unlike the "Provisionals", the "Officials" were Marxist and worked to form a united front with other Irish communist groups, named the Irish National Liberation Front (NLF). The Officials were called the NLF by the Provisionals and were sometimes nicknamed the "Red IRA" by others.
Free Stater (Ireland) Free Stater or pro-Treatyite is a term often used by opponents to describe those in Ireland who supported the Anglo-Irish Treaty of 1921 that led to the creation of the Irish Free State in 1922. The pro-Treaty side included members of the old IRA who had fought the British during the recent Irish War of Independence. Led by Michael Collins and Richard Mulcahy, it soon became the nucleus of the new (regular) Irish National Army that overcame their anti-Treaty IRA opponents during the often bitter Irish Civil War of 1922–23.