Mezue ahịrịokwu na-esonụ: Mgbe McClure gasịrị n'ókèala, ọ nọ na Puerto Rico site na 1899 ruo 1900, mgbe ahụ ọ jere ozi na Philippines site na 1901 ruo 1903. McClure ghọrọ onye gụsịrị akwụkwọ na ụlọ akwụkwọ nke Line na 1909, ma gụsịrị akwụkwọ na kọleji ndị agha na 1910. Ọ ghọrọ onye nkuzi n'ụlọ akwụkwọ ndị agha site na 1913 ruo 1916. N'oge opupu ihe ubi nke afọ 1916, o sonyere na
Njem Pancho Villa. Na 1917, McClure gụsịrị akwụkwọ na United States Army War College ma bulie ya n'ọkwa Brigadier General na Disemba 17 nke afọ ahụ. Ọ bụ ya bụ ọchịagha nke Base Camp Number One na San Nazaire, France, ruo 1918. McClure mechara bụrụ ọchịagha nke 69th Infantry Brigade maka ọnwa abụọ, wee nye iwu nke 38th Infantry Division maka izu ise. McClure nọrọ ọnwa atọ n'agha na ngalaba nke 69 na nke 38. McClure rụrụ ọrụ n'ọfịs Onyeisi ndị ọrụ na Washington site na ngwụcha afọ 1918 ruo mbido afọ 1919. Site na 1920 ruo 1922, o jere ozi dị ka onye enyemaka nke ndị isi nke Disciplinary Barracks na Fort Leavenworth, Kansas na site na 1923 ruo 1926 ọ rụrụ ọrụ na Signal Corps. McClure lara ezumike nká dị ka onye ọchịagha na 21 Julaị 1929, e weghachikwara ọkwa Brigadier General ya na June 1930.