Ku dhammee weedha soo socota: Dr. McHenry wuxuu ku biiray Ururka Shaqaalaha Iskaa wax u qabso ee Maraykanka sanadkii 1898, isagoo ahaa dhakhtar qalliin oo qandaraas ku leh darajada kabtan. Wuxuu ka soo shaqeeyay dagaalkii Isbaanishka iyo Mareykanka ee Cuba,
Kacdoonkii Filibiin, iyo Shiinaha. Sanadkii 1903, Dr. McHenry waxaa laga siidaayay ciidanka caafimaadka ee Maraykanka isagoo haysta darajada major.