Mezue ahịrịokwu na-esonụ: Catlin gụsịrị akwụkwọ na Army War College otu ọnwa mgbe Agha Ụwa nke Mbụ tiwapụrụ. Mgbe nke ahụ gasịrị, e mere ya onyeisi nke ogige ọzụzụ ndị agha mmiri nke mba ọzọ dị na Quantico, Virginia. N'ọnwa Ọktoba 1917, e zigara Catlin na France dị ka onye isi ndị agha nke isii. Site na June 1 ruo 6, 1918, ndị 6th Regiment hụrụ ihe n'ihu ihu site na Paris-Metz Road site na Lucy-le-Bocage ruo Hill 142. Na June 6, 1918, mgbe ndị agha ya na-awakpo
Bois de Belleau, onye na-agba égbè merụrụ ya ahụ n'obi ma kpọga ya ụlọ ọgwụ n'echi ya. Ọ bụ nke mbụ a na-emerụ ya ahụ n'ime afọ 28 o jerela ozi.