 Over the time between 12 July 1921 to 30 June 1922, Peter, was working under his sister Bridie's often commander Patrick O’Donnell.He was involved in no military engagements, and spent around ten days recovering in the Mater Hospital in Dublin from his hunger strike.In the second last time period from 1 July 1922 to 31 March 1923 and under Patrick O’Donnell's command once more, Peter “carried out all orders of commanding officers in connection with general activities, training etc.