Collins rose through the ranks of the Irish Volunteers and Sinn Féin after his release from Frongoch. He was elected as a Teachta Dála for South Cork in 1918, and was appointed Minister for Finance in the First Dáil. He was present when the Dáil convened on 21 January 1919 and declared the independence of the Irish Republic. In the ensuing War of Independence, he was Director of Organisation and Adjutant General for the Irish Volunteers, and Director of Intelligence of the Irish Republican Army. He gained fame as a guerrilla warfare strategist, planning and directing many successful attacks on British forces, such as the "Bloody Sunday" assassinations of key British intelligence agents in November 1920.