This thesis explores the ‘Irish Revolution’ through a systematic analysis of events at a regional level in Co. Leitrim between the years 1912 and 1923. Both political behaviour and military activity are examined from the introduction of the Home Rule Bill to the end of the Irish Civil War, a period of extraordinary upheaval and unrest at a national level. The contested historiography of the period is outlined, and its application to Leitrim is examined. Aside from the 1919-1923 period of intense conflict across the country, the eleven-year period between 1912 and 1923 witnessed a massive political transformation with the collapse of the Irish Party and the rise of Sinn Féin. The study examines the party machines of constitutional and adv...