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 In April 1938, de Valera and British Prime Minister Neville Chamberlain signed the Anglo-Irish Trade Agreement, lifting all duties imposed during the previous five years and ending British use of the Treaty Ports it had retained in accordance with the Anglo-Irish Treaty. The return of the ports was of particular significance, since it ensured Irish neutrality during the coming Second World War. By September 1939, a general European war was imminent. On 2 September, de Valera advised Dáil Éireann that neutrality was the best policy for the country. This policy had overwhelming political and popular support, though some advocated Irish