Ramba uchiverenga ndima iyi - Pakatanga Hondo yeSpain neAmerica, Upton akapinda muuto reUnited States. Akashanda somumwe munhu muH Company ye2nd Oregon Volunteer Infantry Regiment uye akabatanidzwa mukubatwa kweGuam uye mishandirapamwe yePhilippines
. Upton akaramba ari muOregon National Guard pashure pehondo. Pakazosvika 1911, akanga achishumira sa sergeant mukuru we3rd Regiment yeOregon Infantry.