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
Éamon de Valera recommend the Treaty to Dáil Éireann; the Treaty was finally signed by the delegates after further negotiations which closed at 02:20 on 6 December 1921. De Valera balked at the agreement. His opponents claimed that he had refused to join the negotiations because he knew what the outcome would be and did not wish to receive the blame. De Valera claimed that he had not gone to the treaty negotiations because he would be better able to control the extremists at home, and that his absence would allow leverage for the plenipotentiaries to refer back to him and not be