Morgan was also employed by the Inter-Allied Military Commission of Control as Deputy Adjutant-General in Berlin from 1919 to 1923.[3] Here he witnessed German attempts to build up their army contrary to the terms of the Treaty of Versailles. He published his findings in October 1924 in the Quarterly Review, titled "The Disarmament of Germany and After". In reply to the German Rhodes scholar at Oxford University, Adolf Schlepegrell, who claimed in October 1933 that Germany had fulfilled the disarmament clauses of the Versailles Treaty, Morgan wrote to The Times: "Germany never disarmed, never intended to disarm, and for seven years did everything in her power to obstruct, deceive, and "counter-control" the Commission whose duty it was to disarm her".[4][5]
In a speech to the House of Commons on 9 May 1940, David Lloyd George claimed that Germany by 1931 was "completely disarmed" and that "we had the certificate of the ambassadors to say that disarmament was completed, but in spite of that, we did not carry out our part" in disarming.[6] Morgan wrote to the Daily Telegraph on 14 May, stating that no such certificate was issued and that "the "democratic" Government of Germany did not disarm". He further claimed that the commission was withdrawn as the price for Germany's signature to the Treaty of Locarno and upon the acceptance of their pledge to disarm: "Those pledges were never kept. Within two years of our withdrawal the Army Estimates of the "democratic" German Government went up by leaps and bounds to an unprecedented degree".[7] Morgan asserted that: "If any one English statesman is to be held responsible for German rearmament it is Mr. Lloyd George" because of his government's repeated assurances during 1921–22 that Germany had carried out the disarmament clauses (including the limitation of her army to 100,000) despite being informed by the senior British officer in Berlin that the number of men being trained by the army during 1920–23 was 500,000.[7] Morgan concluded:
I have in front of me a copy of the Neue Illustrierte Zeitung of 12 September 1935, saluting with a glowing eulogy that Scharnhorst of the Treaty of Versailles, Gen. von Seeckt...for having so successfully obstructed the attempts of the Allied Control Commission to disarm Germany during the years 1920–1926 that he had thereby "prepared the way" (vorbereitet) for Hitler's rapid restoration of the military might of Germany in all its menace. During the "close season" of German rearmament which followed on the withdrawal of the Control Commission Mr. Lloyd George persisted in proclaiming to the world the innocuous character of Germany's "tiny army", as he chose to call it, and insisted that the only menace to the peace of Europe was the defensive measures which, happily for him and for us, the French were taking to meet the covert revival of German militarism.[7]
After World War II he elaborated on this theme in his book Assize of Arms, originally intended to be the first of two volumes but Morgan only got round to publishing the first volume.
He retired from the army in 1923 with the honorary rank of Brigadier-General.[8]
Later career
Whilst serving in the military, Morgan was appointed Professor of Constitutional Law at University College London in 1915; Thomas Baty deputised for him until he retired from the army in 1923 and he taught until 1941.[1]
In 1916 Morgan was counsel for the defence and appeared as an amicus curiae in the trial for treason of Sir Roger Casement.[1][9]
In 1918 Morgan investigated a case involving Dr. A. M. Low
Morgan claimed that he coined the famous phrase: "Irish history is a thing for Irishmen to forget and for Englishmen to remember"—which he said was later used without acknowledgement by Horace Plunkett.[11][12]