Wars Involving Ireland: From Independence to Peacekeeping

Ireland's military history spans rebellion, civil war, neutrality, and modern peacekeeping.

Irish War of Independence (1919–1921)

Guerrilla campaign by IRA against British forces. Resulted in Anglo-Irish Treaty creating the Irish Free State (26 counties).

Irish Civil War (1922–1923)

Split between pro-Treaty (Free State) and anti-Treaty (Republic) factions. Pro-Treaty won; defined early Irish politics.

The Troubles / Northern Ireland Conflict (1968–1998)

Sectarian conflict in Northern Ireland (UK). IRA vs. British Army/loyalist paramilitaries. ~3,500 deaths. Ended with Good Friday Agreement.

World Wars

• WWI (1914–18): ~200,000 Irishmen served in British Army; ~30,000 died. Simultaneous 1916 Easter Rising.
• WWII (1939–45): Ireland (Free State) remained neutral ("The Emergency"); ~70,000 from south volunteered for British forces; Northern Ireland fully involved.

Post-WWII: Peacekeeping, Not Warfighting

• UN Peacekeeping: Continuous since 1958 (Lebanon, Congo, Cyprus, Chad, Liberia, etc.). ~80+ missions; 88 fatalities.
• Gulf War (1990–91): Logistical support only (airfield use, medical).
• Afghanistan (2001–21): Logistical/transport support; no combat troops.
• EU Battlegroups, NATO PfP: Training, crisis management.

Constitutional Note

Irish Constitution (Art. 29) renounces war as instrument of policy; "triple lock" (UN + Govt + Dáil) required for deployments >12 personnel.