The Boundary Commission determined the current border in 1925, although the Irish delegate (Professor Eoin MacNeill) had resigned from it in protest at its failure to respect the terms of the Treaty.
Ireland | Northern Ireland | Republic of Ireland | United Kingdom of Great Britain and Ireland | Ireland national rugby union team | Church of Ireland | New Ireland Province | Lord Lieutenant of Ireland | Lord Chancellor of Ireland | Lord Deputy of Ireland | Northern Ireland national football team | National University of Ireland | High King of Ireland | All-Ireland Senior Hurling Championship | All-Ireland Senior Football Championship | League of Ireland | President of Ireland | Northern Ireland Assembly | New Ireland | Kingdom of Ireland | Lord Chief Justice of Ireland | Attorney-General for Ireland | National University of Ireland, Galway | National Library of Ireland | Music of Ireland | All-Ireland Senior Camogie Championship | Secretary of State for Northern Ireland | Police Service of Northern Ireland | Solicitor-General for Ireland | Royal College of Surgeons in Ireland |