Sinn Féin for nine years. (It merged with two other organisations to form Fine Gael in 1933.) Anti-Treaty Sinn Féin members continued to boycott the Dáil. At a special "Ard Fheis" in March 1926, de Valera proposed that elected members be allowed to take their seats in the Dáil if and when the controversial Oath of Allegiance was removed. When his motion was defeated, de Valera resigned from Sinn Féin; on 16 May 1926, he founded his own party, Fianna Fáil, which was dedicated to republicanising the Free State from within its political structures. He took most Sinn Féin TDs with him.
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