 Complete the following phrase:  In June 1917, then Captain Richardson was assigned to the 2nd Cavalry at Fort Ethan Allen, Vermont and on July 9, 1917, he was appointed Aide to Major General T. H. Barry who commanded the Central Department, Chicago, Illinois. He helped in the rapid buildup and training of the American Expeditionary Force AEF that was preparing to go to France. Then temporary Major Richardson sailed with General Barry to France from New York December 1, 1917. Fluent in French, Richardson served as Aide and observer with foreign armies until January 9, 1918. On June 14, 1918, he was assigned to the Operations Division, General Staff, AEF as Liaison Officer for G.H.Q Allied Headquarters and with American Armies, Corps, and Divisions during the combat operations of 1918. He escorted Allied missions in 