Ka kammala wannan magana: A shekara ta 1912, Stoddard ya shiga aikin soja a rundunar sojin dakarun soji. A lokacin da
1916 Mexican Expedition, ya shiga rundunar sojojin Amurka kuma ya yi aiki a kan iyakar Mexico a matsayin mai ba da taimako a cikin rundunar soja ta 71, Amurka National Guard. A shekara ta 1917, lokacin da Amurka ta shiga yakin duniya na farko, an ba shi izini a matsayin babban jami'in a cikin Coast Artillery Corps na New York Guard. Daga nan aka tura shi zuwa ƙasashen waje a matsayin babban memba na hukumar don nazarin hanyoyin bindigogin anti-aircraft na rundunar sojojin Burtaniya ta 3 a gaban Somme da rundunar sojojin Faransa ta 10 a gaban Aisne. A cikin 1918, an ba shi izinin Major of Ordinance. Bayan kammala karatunsa daga Kwalejin Yaƙin Soja, ya yi aiki a matsayin Jami'in Dokar Rukunin na 17 har zuwa lokacin da aka sallame shi a watan Janairun 1919. Daga baya a wannan shekarar, an ba shi izinin Lieutenant-Colonel Ordinance na Jami'an Reserve Corps kuma an nada shi Jami'in Dokar Sashen na 98 na sashen da aka tsara. Daga 1923 zuwa 1935, ya kasance colonel mai umurni da 53rd Coast Artillery. Ya yi ritaya a matsayin colonel a cikin Army Reserves. Ya kuma kasance mai taimakawa soja ga Magajin La Guardia a lokacin Yaƙin Duniya na II kuma ya shirya rundunar 'yan sintiri ta Birnin New York.