For the fourth episode of the show I welcome Brian Hanley to the podcast. We discuss the '1969/'19 70 split in the Irish republican movement and the subsequent trajectory of the Provisionals and Officials up until 1972: the deadliest year of the Troubles that saw the Officials eventual ceasefire and the Provisionals famously declaring it the “Year of Victory”. Brian is Assistant Professor of Twentieth Century Irish Hstory at Trinity College Dublin. He focuses on Irish republicanism and political radicalism, particularly the politics and activity of the Irish Republican Army. His current research examines the global impact of the Irish Revolution (1916-23), building on work he has  done on Irish republicanism among the diaspora, particularly in Irish America. His most recent book is The impact of the Troubles on the Republic of Ireland, 1968-79: boiling volcano? (Manchester University Press, 2018). Other books include A Documentary History of the IRA, 1916-2005, A Guide to Irish Military Heritage, The IRA, 1926-1936 and - most relevant to our discussion today: The Lost Revolution: the story of the Official IRA and the Workers Party (with Scott Millar). Brian regularly appears on podcasts such as The Irish History Show and History Ireland. He is also a contributor to History Ireland magazine, The Irish Times, The Irish Independent and The Guardian.