Kammala wannan jumla: Ya koma Amurka a watan Agusta 1917, watanni huɗu bayan shigar Amurka cikin Yaƙin Duniya na I, kuma ya yi aiki (yanzu tare da mukamin kyaftin) tare da Rundunar Sojoji ta 58 a Pennsylvania da North Carolina. A watan Yulin 1918, an tura rundunarsa zuwa Yammacin Yamma don yin aiki a matsayin wani ɓangare na Rundunar Sojan Amurka (AEF), wanda Janar John J. Pershing ya umurce shi, wanda ya jagoranci Pancho Villa Expedition. A matsayinsa na jami'in soja, ya halarci ayyukan kare Champagne-Marne, da
Aisne-Marne Offensive, Yaƙin Saint-Mihiel da Meuse-Argonne Offensive. Yaƙin ya ƙare ba da daɗewa ba bayan haka, bayan da aka sanya hannu kan Yarjejeniyar Armistice tare da Jamus a ranar 11 ga Nuwamba, 1918. Saboda jaruntakarsa a yaƙin an ba shi lambar yabo ta Faransa Croix de guerre.