On Cathal Brugha's discharge from hospital in August 1916, Sean Ó Muirthile and O'Hegarty visited Brugha at his home in Rathgar and a provisional committee for the reorganization was established.
Progress was slow for the next few months, but volunteer reorganization gained speed after most of the Rising prisoners were released from Frongoch internment camp in Wales on December 23, 1916.