They participated in the Washington Naval Conference (International Conference on the Limitation of Armaments).

State Department accredited correspondent covering the 1921 Conference on the Limitation of Armaments in Washington, D.C.

From November 1921 - February 1922 as Deputy Director, Directorate of Operations and Intelligence, Air Ministry, he was a delegate to the Washington Conference on the Limitation of Armament.

Maintenance of a defensive status quo of the Philippine Department was mandated by provisions of the 1922 Conference on the Limitation of Armament, although air power was not specifically mentioned in its terms.

Arms-and the Men: Intimate Personal Glimpses of Delegates, Attachés, and Unofficial Personages at the Washington Conference on the Limitation of Armament and Pacific and Far Eastern Problems.

For instance, he is rarely credited for his best appointments, like that of Charles Evans Hughes as Secretary of State, or for convening the Washington Naval Conference on the limitation of armaments, the first global peace summit.

In 1922, President Warren G. Harding appointed Lodge as a delegate to the Washington Naval Conference (International Conference on the Limitation of Armaments), led by Secretary of State Charles Evans Hughes, and included Elihu Root and Oscar Underwood.

During this tour, he also served on the Advisory Commission to the Conference on the Limitation of Armaments in 1921-1922, and as a technical adviser to the Committee of Jurists on the Laws of War at The Hague in the Netherlands in 1923.