Éamon de Valera Irish independence. He was arrested, sentenced to death but released for a variety of reasons, including the public response to the British execution of Rising leaders. He returned to Ireland after being jailed in England and became one of the leading political figures of the War of Independence. After the signing of the Anglo-Irish Treaty, de Valera served as the political leader of Anti-Treaty Sinn Fein until 1926, when he, along with many supporters, left the party to set up Fianna Fáil, a new political party which abandoned the policy of abstentionism from Dáil Éireann. From there, de Valera would
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