Representing Britain at the signing of the Armistice in a railway carriage in Compiègne Forest on 11 November 1918, he was witness to the end of World War I and a marked victory for the Allies. He was confirmed in the rank of Captain in December 1918. He later attended the Paris Peace Conference, 1919. In 1920 he was appointed Naval Attaché in Tokyo. He voluntarily retired in 1922 following the "Geddes Axe", hoping that by so doing he would save from compulsory retirement an officer who was less able to afford it. He was recalled for special service in Egypt during the period of tension over Abyssinia.