The Dublin Guard was a unit of the Irish Republican Army during the Irish War of Independence and then of the Irish National Army in the ensuing Civil War.
In May 1921 the Active Service Unit of the Irish Republican Army's Dublin Brigade and the "Squad" assassination unit were amalgamated. The Guard was created due to the heavy losses sustained by the Dublin Brigade in their burning of the Custom House on May 25, 1921. Five IRA volunteers were killed in the operation and eighty-three captured.Paddy Daly, previously head of the Squad, was put in command of the new unit.
The Guard became part of the new National Army of the Irish Free State in January 1922. They were supportive of the Anglo-Irish Treaty which split the IRA, in large part because of their personal loyalty to Michael Collins. At this time, its numbers were greatly expanded from a core of IRA veterans to a battalion-sized unit, and eventually a brigade. The Dublin Guard provided most of the ceremonial parties that took over barracks and installations from the British, wearing a dark green uniform with brown leather webbing. When the Free State Army was expanded to over sixty thousand men, most of its troops were equipped with dyed British uniforms and webbing. The Guard however retained its original distinctive uniform, and was sometimes nicknamed the "Green and Tans" by hardline anti-Treaty IRA men.
On the outbreak of the Irish Civil War in June 1922, the Dublin Guard were heavily involved in securing Dublin for the Free State (see Battle of Dublin).