Cathal Brugha (1874-1922) was an Irish soldier, politician and revolutionary. Born in Dublin to a Protestant father and Catholic mother, Brugha joined the Gaelic League and would later also serve in the Irish Republican Brotherhood and Irish Volunteers. During the 1916 Easter Rising, Brugha was second-in-command at the South Dublin Union under Commandant Éamonn Ceannt, and was badly injured in the fighting. Elected Ceann Comhairle of the first Dáil Éireann and Chief of Staff of the Irish Republican Army, Brugha was a powerful figure in the republican movement, although resented the influence of Michael Collins, who he would later fall out with over the signing of the Anglo-Irish Treaty. Brugha, having rejected the Treaty, fought during the Battle of the Four Courts and was killed defying surrender to Free State forces.