The marriage certificate of John Kennedy and Mary Douglas

During the Civil War that followed he supported the treaty and joined the National Army. He was promoted to the rank of Sergeant and served as a Lewis gunner. On the morning of 28 June 1922 he reported for duty at 6 a.m. for what would turn into a week of street battles known as the Battle of Dublin. That day, during a break in the battle, he made his way to the nearby Pro-Cathedral where he married his fiancé Mary Douglas and then returned to the fight.