This is the thirteenth book in the county studies series, drawing on new archival records and scholarship to examine the local Irish revolutionary period. Joost Augusteijn expands his previous PhD research and 1998 study of IRA volunteers in west Mayo, with additional material from north and east of the county.[1] He draws on a rich vein of sources including IRA witness statements, local newspapers and interviews with Volunteers and their families, to present a concise and accessible narrative of local events and personalities in Mayo, over 1912-23.