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 matter. O'Duffy backed down when the National Guard was declared an illegal organisation and the march was banned. Within a few weeks, O'Duffy's followers merged with Cumann na nGaedhael and the Centre Party to form "United Ireland", or Fine Gael, and O'Duffy became its leader. Smaller local marches were scheduled for the following weeks, under different names. Internal dissension set in when the party's TDs distanced themselves from O'Duffy's extreme views, and his movement fell asunder. During the 1930s, de Valera had systematically stripped down the Irish Free State constitution that had been drafted by a committee under the nominal