Whakaotihia te rerenga e whai ake nei: I te 18 o Mei 1898 ka noho a Craig hei Kaihauturu Tuatahi o te 20th Kansas Infantry, ka eke ki te rangatira i te tau e whai ake nei. Kaore i roa i muri i tana whakakorenga honore i te 12 o Hune 1899, i whakahoutia ia hei rangatira mo te 36th United States Volunteer Infantry, i mahi ai ia tae noa ki te honore i whakauruhia i te 16 o Poutu-te-rangi 1901. I whakawhiwhia a Craig ki te tūranga tuarua o te Artillery Corps i te 8 o Mei 1901, i whakatairangahia ki te rangatira tuatahi i te 28 o Hurae 1903 ka whakatairangahia ano ki te rangatira, i tenei wa o te Fourth Field Artillery Brigade, i te 25 o Hanuere 1907. I tēnei wā i mahi a Craig i ngā Philippines i waenganui i te 1898 me te 1901 me te 1904<unk>1907. I muri mai ka mahi a Craig i Mexico i Veracruz (1914) me te
Ko te haerenga whiu ki a Pancho Villa (1916). Whai muri i tana mahi i Mexico, ka uru a Craig ki te General Staff Corps i te 25 o Noema 1916, hei rangatira mo nga kaimahi o te 12th Infantry Division tae noa ki te noho hei kaiawhina mo nga kaimahi o te Tari ki te Tonga i te 24 o Poutu-te-rangi 1917. I muri mai ka uru ia ki te War College Division hei Kaiwhakahaere Matua i Washington, DC, mai i te Paenga-whawha ki te Pipiri 1917, i te wa i whakatairangahia ai ia ki te rangatira nui i te 15 o Mei 1917. I te marama o Akuhata 1917 i haere ia ki Parani hei koroneela i roto i te Ope Taua. I te Pakanga Tuatahi o te Ao, i mahi a Craig hei rangatira rangatira mo nga roopu pupuhi rereke, i te mutunga ka riro ia hei rangatira rangatira i te Oketopa 1918. I whakahaua e ia te 302nd Regimented Field Artillery, 151st Brigade, 76th Division me te 157th Field Artillery Brigade i te 1918 me muri mai ko te 158th, 2nd me te 5th Field Artillery Brigades i te 1919. Mo tana mahi i te wa o te pakanga, i whakawhiwhia a Craig ki te Tohu Ratonga Motuhake a te US me te Tohu Hiriwa a French.