 Nyorai kupfuurira kweiyi ndima - Muna June 1917, ipapo Captain Richardson akagoverwa ku2nd Cavalry paFort Ethan Allen, Vermont uye musi waJuly 9, 1917, akagadzwa kuva Mubatsiri kuna Major General T. H. Barry uyo akaraira Central Department, Chicago, Illinois. Akabatsira mukuunganidza nokukurumidza uye kurovedza kweAmerican Expeditionary Force AEF iyo yakanga ichigadzirira kuenda kuFrance. Ipapo Major Richardson wenguva pfupi akaenda nechikepe naGeneral Barry kuFrance vachibva kuNew York musi waDecember 1, 1917. Achinyatsogona chiFrench, Richardson akashanda somubatsiri uye mutariri nemauto okune dzimwe nyika kusvikira pana January 9, 1918. Musi waJune 14, 1918, akagoverwa kuOperations Division, General Staff, AEF semushandi wekubatana weG.H.Q Allied Headquarters uye nemauto eAmerica, mauto, uye zvikamu panguva yekurwisana kwe1918. Akaperekedza maAllied missions muSt. Mihiel Offensive. Parizvino Lt Colonel wenguva pfupi, Richardson aive Liaison Officer neHeadquarters, 1st Army kuvhurwa kweMeuse-Argonne Offensive uye Mumiriri weOperations Officer paAdvance G.H.Q. Nekuguma kwehondo, ikozvino mukuru wenguva pfupi, Richardson akabatana neReparations Board, Peace Commission, Paris kubva muna Ndira 28 kusvika Kukadzi 28, 1919. Sechikamu chemauto ehondo, Colonel Richardson akashanda kwenguva pfupi paMahofisi makuru, Third Army muCoblenz, Germany, uye akabatanidzwa kuMahofisi makuru, 10th French Army, Mayence, Germany kusvika muna Chikumi 1, 1919. 