Eoin O'Duffy (born Owen Duffy; 28 January 1890 – 30 November 1944) was an Irish military commander, police commissioner and fascist leader. O'Duffy was the leader of the Monaghan Brigade of the Irish Republican Army (IRA) and a prominent figure in the Ulster IRA during the Irish War of Independence. In this capacity, he became Chief of Staff of the IRA in 1922. He accepted the Anglo-Irish Treaty and as a general became Chief of Staff of the National Army in the Irish Civil War, on the pro-Treaty side. Wikipedia
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