John Maurice ‘Jack’ MacCarthy was born in Kilfinane, County Limerick, and was educated to primary school level locally. He completed his secondary education in Clongowes Wood College in County Kildare. From an early age MacCarthy was highly interested in nationalist politics. He joined the Irish Volunteers at their inception in 1914 and was involved in the reorganisation of the Volunteers in 1917 following the release of IRA prisoners. In the War of Independence he was successively Commandant of the Galtee Battalion, Commandant of the East Limerick Brigade and Vice Officer Commanding and Adjutant of the 4th Southern Division of the Irish Republican Army. He was heavily involved in all the major operations conducted by the East Limerick Brigade during the conflict, most famously in the events surrounding the downing of an RAF airplane by the IRA. At the end of the War of Independence, MacCarthy joined the pro-Treaty side for purely pragmatic reasons, realising that the IRA would be unable to recommence hostilities against the vastly superior British forces. In later years, MacCarthy worked as military correspondent to the *Irish Independent* during the Second World War and was the author of *Limerick’s Fighting Story* (1948).