Mezue ahịrịokwu na-esonụ: Dr. McHenry sonyeere Ndị Ọrụ Afọ Ofufo nke United States na 1898, dị ka dọkịta na-awa ahụ n'ọrụ nkwekọrịta nke nwere ọkwá onyeisi ndị agha. O jere ozi na Spanish-American War na Cuba, na
Ọgba aghara na Philippines, na China. Na 1903, a chụrụ Dr. McHenry n'Òtù Ndị Agha Ahụ́ Ike nke United States n'ọkwá onye isi ndị agha.