Formerly the National Bank building, the Headford Army Barracks housing Free State forces was attacked by Anti-treaty troops who had crossed Lough Corrib in boats from Oughterard and planted mines against the walls. A gun fight ensued, lasting until Free State reinforcements arrived and forced the withdrawal of the Anti-treaty forces. Two Free State soldiers, Sergeant Major M. McCarthy and Volunteer Lyons, were killed and five others injured. Two Anti-treaty soldiers also lost their lives, John Higgins of Ballytrasna there during the battle, and Daniel McCormack of Laskeevy, Tuam, would die later of his wounds.
Although damaged in the attack, the building survived and today houses offices.