Peter Paul Galligan was an Irish

Ireland

Ireland is an island to the northwest of continental Europe. It is the third-largest island in Europe and the twentieth-largest island on Earth...

 Sinn Féin

Sinn Féin

Sinn Féin is a left wing, Irish republican political party in Ireland. The name is Irish for "ourselves" or "we ourselves", although it is frequently mistranslated as "ourselves alone". Originating in the Sinn Féin organisation founded in 1905 by Arthur Griffith, it took its current form in 1970...

 politician. A member of the Irish Republican Brotherhood

Irish Republican Brotherhood

The Irish Republican Brotherhood was a secret oath-bound fraternal organisation dedicated to the establishment of an "independent democratic republic" in Ireland during the second half of the 19th century and the start of the 20th century...

 and the Irish Volunteers

Irish Volunteers

The Irish Volunteers was a military organisation established in 1913 by Irish nationalists. It was ostensibly formed in response to the formation of the Ulster Volunteers in 1912, and its declared primary aim was "to secure and maintain the rights and liberties common to the whole people of Ireland"...

, he was sent to Wexford from Dublin during the Easter Rising

Easter Rising

The Easter Rising was an insurrection staged in Ireland during Easter Week, 1916. The Rising was mounted by Irish republicans with the aims of ending British rule in Ireland and establishing the Irish Republic at a time when the British Empire was heavily engaged in the First World War...

 to ensure that the volunteers in the area rose to support those in Dublin. He was elected unopposed as a Sinn Féin

Sinn Féin

Sinn Féin is a left wing, Irish republican political party in Ireland. The name is Irish for "ourselves" or "we ourselves", although it is frequently mistranslated as "ourselves alone". Originating in the Sinn Féin organisation founded in 1905 by Arthur Griffith, it took its current form in 1970...

 MP

Member of Parliament

A Member of Parliament is a representative of the voters to a :parliament. In many countries with bicameral parliaments, the term applies specifically to members of the lower house, as upper houses often have a different title, such as senate, and thus also have different titles for its members,...

 for Cavan West

West Cavan (UK Parliament constituency)

West Cavan was a parliamentary constituency in Ireland, which from 1885 to 1922 returned one Member of Parliament to the House of Commons of the United Kingdom of Great Britain and Ireland.Prior to 1885 the area was part of the Cavan constituency...

 at the 1918 general election.

In January 1919, Sinn Féin MPs who had been elected in the Westminster elections of 1918 refused to recognise the Parliament of the United Kingdom

Parliament of the United Kingdom

The Parliament of the United Kingdom of Great Britain and Northern Ireland is the supreme legislative body in the United Kingdom, British Crown dependencies and British overseas territories, located in London...

 and instead assembled in the Mansion House

Mansion House, Dublin

The Mansion House on Dawson Street, Dublin, is the official residence of the Lord Mayor of Dublin since 1715.-Features:The Mansion House's most famous features include the "Round Room", where the First Dáil assembled on 21 January 1919 to proclaim the Irish Declaration of Independence...

 in Dublin as a revolutionary parliament called Dáil Éireann

First Dáil

The First Dáil was Dáil Éireann as it convened from 1919–1921. In 1919 candidates who had been elected in the Westminster elections of 1918 refused to recognise the Parliament of the United Kingdom and instead assembled as a unicameral, revolutionary parliament called "Dáil Éireann"...

, though Galligan did not attend as he was in prison. He was re-elected as a Sinn Féin Teachta Dála

Teachta Dála

A Teachta Dála , usually abbreviated as TD in English, is a member of Dáil Éireann, the lower house of the Oireachtas . It is the equivalent of terms such as "Member of Parliament" or "deputy" used in other states. The official translation of the term is "Deputy to the Dáil", though a more literal...

 (TD) for the Cavan constituency

Cavan (Dáil Éireann constituency)

Cavan was a parliamentary constituency represented in Dáil Éireann, the lower house of the Irish parliament or Oireachtas from 1921 to 1977. The method of election was the single transferable vote form of proportional representation .- History :...

 at the 1921 elections

Irish elections, 1921

Two elections in Ireland took place in 1921, as a result of the Government of Ireland Act 1920 to establish the House of Commons of Northern Ireland and the House of Commons of Southern Ireland. The election was used by Irish Republicans as the basis of membership of the Second Dáil...

. He supported the Anglo-Irish Treaty

Anglo-Irish Treaty

The Anglo-Irish Treaty , officially called the Articles of Agreement for a Treaty Between Great Britain and Ireland, was a treaty between the Government of the United Kingdom of Great Britain and Ireland and representatives of the secessionist Irish Republic that concluded the Irish War of...

 and voted in favour

Anglo-Irish Treaty Dáil vote

The Anglo-Irish Treaty was signed in London on 6 December 1921. Dáil Éireann voted on the treaty on 7 January 1922, following a debate through late December 1921 and into January 1922.-Result:Of the 125 Teachtaí Dála , 121 cast their vote in the Dáil...

 of it. He did not contest the 1922 general election

Irish general election, 1922

The Irish general election of 1922 took place in Southern Ireland on 16 June 1922, under the provisions of the 1921 Anglo-Irish Treaty to elect a constituent assembly paving the way for the formal establishment of the Irish Free State...

and retired from politics.