Kammala wannan jumla: A ranar 18 ga Mayu 1898 Craig ya zama na farko na 20th Kansas Infantry, ya ci gaba da kyaftin din a shekara mai zuwa. Ba da daɗewa ba bayan da aka sauke shi a ranar 12 ga Yuni, 1899, an sake sanya shi a matsayin kyaftin na 36th United States Volunteer Infantry, inda ya yi aiki har sai da aka girmama shi a ranar 16 ga Maris, 1901. An ba Craig mukamin Laftanan na biyu na Sojojin Artillery a ranar 8 ga Mayu, 1901, an ba shi mukamin Laftanan na farko a ranar 28 ga Yuli, 1903 kuma an sake inganta shi zuwa kyaftin, a wannan lokacin na Brigade na Artillery na Hudu, a ranar 25 ga Janairu, 1907. A wannan lokacin Craig yayi aiki a cikin Philippines tsakanin 1898 da 1901 da 1904<unk>1907. Craig daga baya ya yi aiki a Mexico a Veracruz (1914) kuma a cikin
Tafiya mai azabtarwa a kan Pancho Villa (1916). Bayan ya yi aiki a Mexico, Craig ya zama wani ɓangare na Janar Janar Janar a ranar 25 ga Nuwamba, 1916, yana aiki a matsayin shugaban ma'aikata na 12th Infantry Division har sai ya zama mataimakin shugaban ma'aikata na Kudancin Kudancin ranar 24 ga Maris, 1917. Daga bisani ya zama wani ɓangare na Kwalejin Kwalejin War a matsayin Janar Janar a Washington, DC, daga Afrilu zuwa Yuni 1917, lokacin da aka ci gaba da shi a ranar 15 ga Mayu, 1917. A watan Agusta 1917 ya tafi Faransa a matsayin colonel a cikin Sojojin Kasa. A lokacin Yaƙin Duniya na I, Craig ya yi aiki a matsayin kwamandan kwamandan dakarun bindigogi daban-daban, a ƙarshe ya zama brigadier janar a watan Oktoba 1918. Ya umurci rundunar 302 na Regimented Field Artillery, 151st Brigade, 76th Division da 157th Field Artillery Brigade a 1918 kuma daga baya 158th, 2nd da 5th Field Artillery Brigades a 1919. Don hidimarsa a lokacin yaƙin, Craig ya sami lambar yabo ta Amurka da lambar yabo ta azurfa ta Faransa.