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 southeastern approaches to the city. After a week of fighting, the order came from Pádraig Pearse to surrender. De Valera was court-martialled, convicted, and sentenced to death, but the sentence was immediately commuted to penal servitude for life. De Valera was among the few republican leaders the British did not execute. It has been argued that his life was saved by four facts. First, he was one of the last to surrender and he was held in a different prison from other leaders, thus his execution was delayed by practicalities. Second, the US Consulate in Dublin made representations before his