Pedzisa mutsara unotevera: Holbrook akaiswa paSchofield Barracks, Hawaii kusvikira pana April 4, 1916 uye ipapo akanga ari Quartermaster paFort Riley, kusvikira muna July 1916. Muna 1916, akashanda naGeneral John J.
Mauto okuMexico, somutungamiriri wemabheka. Ikoku kwakanga kuri kushandiswa kwokutanga kwehovhoni yomunda yeuto, iyo akanga agadzira.