Timeline of the Irish Republican Army

This is a timeline of the history of the Irish Republican Army.

Note: Articles prior to 1916 refer to armed nationalist movements that predated and presaged the foundation of the Irish Republican Army in 1913 – organizations such as the Fenian Brotherhood, Clan na Gael and the Irish Republican Brotherhood. All claims to use the title after 1922 (when the Anglo-Irish Treaty ended the War of Independence) are formally disputed, despite widespread usage in practice. There is a further dispute regarding the 1969 split between the "Official" IRA and the (subsequently dominant) splinter groups the Provisional IRA and Irish National Liberation Army, again despite widespread usage in practice.