Irish Republic the Third Dáil, and all future institutions arising from it, as illegal. (See Second Dáil). The anti-Treaty side was then defeated in the Civil War. Most militant opposition to the Free State came to an end on 24 May 1923 when Frank Aiken, chief-of-staff of the IRA issued the order to "dump arms" and Éamon de Valera issued his address to the "Legion of the Rearguard". Éamon de Valera continued as president of the Sinn Féin political party. In March 1926, Éamon de Valera, along with most anti-Treaty politicians, founded a new party called 'Fianna Fáil' and ended their boycott
Sinéad de Valera Sinéad de Valera Sinéad de Valera (née Ní Fhlannagáin; 3 June 1878 – 7 January 1975) was the wife of Taoiseach and the 3rd President of Ireland, Éamon de Valera. She was also the author of a number of children's books in English and Irish. She was born Jane O'Flanagan in Balbriggan. Her father, Laurence, was a carpenter and was a native of Kildare who moved to Balbriggan and married a local girl, Margaret Byrne. The couple emigrated to New York City where their daughter, Mary, was born in 1871. The family had returned to Balbriggan in 1873, and Sinéad