Kammala jumla mai zuwa: Maus ya yi aiki a matsayin mataimakin Janar Nelson Appleton Miles a lokacin ziyarar da aka yi a Turai a 1897 da kuma lokacin yakin Spain da Amurka a 1898. Maus ya ci gaba da zama Major a watan Yuni 1899 kuma wata daya daga baya ya zama Babban Jami'in Ma'aikatar California da Columbia. An ba shi mukamin Laftanar Kanal a watan Yunin 1902 kuma a lokacin 1902-03 ya kasance tare da Miles a yawon shakatawa na duniya. A cikin Janairu 1904 ya zama kwamandan kuma Kanar na 20th US Infantry, wanda ya umurce shi a cikin
Tashin hankali na Philippine har zuwa 1906, lokacin da ya koma California. Ya kasance dan lokaci a cikin umurnin Division of Pacific a lokacin da Janar Frederick Funston ya tafi kuma ya taka muhimmiyar rawa wajen kiyaye tsari a San Francisco bayan girgizar kasa na San Francisco. Maus ya ci gaba da zama Brigadier Janar a shekara ta 1906, ya umurci Ma'aikatar Columbia har zuwa 1911, lokacin da aka ba shi umurnin brigade na 2nd Division a San Antonio, Texas. A lokacin da ya yi ritaya a watan Agustan 1913, ya kasance kwamandan brigade na 1st Division a Albany, New York.