 The Easter Rising of 1916 was carried out by the latter group together with a smaller socialist militia , the Irish Citizen Army . The British response , executing fifteen leaders of the Rising over a period of ten days and <unk> or <unk> more than a thousand people , turned the mood of the country in favour of the rebels . Support for Irish <unk> increased further due to the ongoing war in Europe , as well as the Conscription Crisis of 1918 . 
