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 Prime Minister of His Majesty's Government in the Irish Free State, wrote in July 1936 to King Edward VIII in London indicating that he planned to introduce a new constitution, the central part of which was to be the creation of an office de Valera provisionally intended to call "President of Saorstát Éireann" (Uachtarán Shaorstát Éireann), which would replace the governorship-general. De Valera used the sudden abdication of Edward VIII as King to pass two bills: one amended the constitution to remove all mention of the monarch and Governor-General, while the second brought the monarch back, this time through statute