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 from June 1919 to December 1920 and had mixed success. One negative outcome was the splitting of the Irish-American organisations into pro- and anti-de Valera factions. He met the young Harvard-educated leader from Puerto Rico, Pedro Albizu Campos, and forged a lasting and useful alliance with him. De Valera managed to raise $5,500,000 from American supporters, an amount that far exceeded the hopes of the Dáil. Of this, $500,000 was devoted to the American presidential campaign in 1920, helping him gain wider public support there. In 1921 it was said that $1,466,000 had already been spent, and it is unclear