Margaret Pearse defeated at the 1922 general election. She supported those who opposed the Treaty during the Irish Civil War and continued to be a member of Sinn Féin until 1926. In 1926 she left the party conference with Éamon de Valera and became a founder member of Fianna Fáil. She never stood for election again. Her daughter Margaret Mary Pearse also joined Fianna Fáil, and served as a TD from 1933 to 1937 and later served in Seanad Éireann as a Senator from 1938 until her death in 1968. At the launch of "The Irish Press" newspaper Margaret was asked to
Fianna Éireann the Irish Free State in 1931. This was reversed when Fianna Fáil came to power in 1932, but re-introduced in 1938. During the splits in the Republican movement of the later part of the 20th century, the Fianna and Cumann na mBan supported Provisional Sinn Féin in 1969 and Republican Sinn Féin in 1986. The Fianna is a Proscribed Organisation in the United Kingdom under the Terrorism Act 2000. An earlier "Fianna" was organised "to serve as a Junior Hurling League to promote the study of the Irish Language" on 26 June 1902 at the Catholic Boys’ Hall, Falls Road,