Irish Citizen Army

Irish Citizen Army
Arm Cathartha na hÉireann
The original Starry Plough flag from 1914, flown during the Easter Rising
Leaders	James "Jim" Larkin Jack White Michael Mallin James Connolly Christopher "Kit" Poole Constance Markievicz
Dates of operation	1913–1947
Headquarters	Liberty Hall, Dublin
Ideology	Irish republicanism Socialism Syndicalism Anti-imperialism Marxism
Size	c. 1,000 (1913) c. 300 (1916) c. 200 (1920) c. 140 (1922) c. 300 (1934)
Allies	Irish Volunteers Irish Republican Army
Opponents	British Empire British Army Royal Irish Constabulary Dublin Metropolitan Police Industrialists
Battles and wars	Dublin Lockout Easter Rising

The Irish Citizen Army (Irish: Arm Cathartha na hÉireann), or ICA, was a paramilitary group first formed in Dublin to defend the picket lines and street demonstrations of the Irish Transport and General Workers' Union (ITGWU) against the police during the Great Dublin Lockout of 1913. Subsequently, under the leadership of James Connolly, the ICA participated in the Irish Republican insurrection of Easter 1916.

Following the Easter Rising, the death of James Connolly and the departure of Jim Larkin, the ICA largely sidelined itself during the Irish War of Independence by choosing to only offer material support to the Irish Republican Army and not become directly involved itself. Following the ICA's declaration in July 1919 that members could not be simultaneously members of both the ICA and the IRA, combined with the ICA's military inactivity, there was a steady stream of desertion from the ICA. During the Irish Civil War, the ICA declared itself "neutral", resulting in further departures from the organisation.

The ICA ceased to hold any military importance from 1920 until 1934 when the newly formed Republican Congress attempted to revive it. However, when the republican-socialist alliance split and collapsed over ideological in-fighting, so too did the ICA.