Whakakiia te rerenga e whai ake nei: I whakahaeretia a McRae ki te Third Infantry, a, i mahi i nga mahi rohe mai i te 1886-1888. I te wā o te Pakanga Paniora-Amerika, i te
Ko te Pakanga o El Caney i Cuba, ā, i mahi hoki ia i roto i te Rōpū Hauora, nāna ia i whiwhi i tana Tohu Whetu Hiriwa tuatahi. I whakawhiwhia ia ki tana whetu hiriwa tuarua i te wa o te Philippine Insurrection a i taunakitia ia mo te whakatairanga patete. Mai i te 1905 ki te 1908, i mahi ia i runga i te General Staff, a i te 1911, i puta ia i te United States Army War College. I mahi a McRae i te Tari o te Kaihauturu Nui mai i te 1913 ki te 1917, a i te Akuhata 5, 1917, i whakatairangahia ia ki te rangatira rangatira me te whakahau i te 158th Depot Brigade i Camp Sherman, Ohio. Hei taapiri, i whakahaua e ia te Tuarua o te Tuarua o te Tuarua o te Tuarua o te Tuarua. I whakatairangahia ia ki te rangatira nui i te Paenga-whāwhā 12, 1918, ka whakahau i te 78th Infantry Division (AEF) tae noa ki Hune 1919, i te wa i whakakorehia ai. Mo tenei, i whiwhi ia i te Tohu Ratonga Motuhake. I te tau 1921 me te 1922, ko ia te kaiawhina rangatira, G-1 (kaimahi).