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 that Proportional Representation had been responsible for the instability that had characterised much of the post war period. A constitutional referendum to ratify this was defeated by the people. One aspect of de Valera's legacy is that since the foundation of the state, a de Valera has nearly always served in Dáil Éireann. Éamon de Valera served until 1959, his son, Vivion de Valera, was also a Teachta Dála (TD). Éamon Ó Cuív, his grandson, is currently a member of the Dáil while his granddaughter, Síle de Valera is a former TD. Both have served in ministries in the Irish