Kammala wannan magana: Yayin da ya hau kan mukamai ya shiga cikin yaƙe-yaƙe na Indiyawan Amurka, ya yi aiki a Puerto Rico a lokacin Yaƙin Mutanen Espanya da Amurka. Ya kasance tare da 11th Infantry a 1901 lokacin da aka umurce shi zuwa Philippines a lokacin Philippine-American War, kuma ya yi aiki a Carigara a tsibirin Leyte. A cikin 1902, ya shiga cikin yaƙi da 'yan tawaye na Filipino a Leyte da Samar, kuma a cikin wani rikici ya ji rauni da bolo. A lokacin da
Pancho Villa Expedition, Alexander ya yi aiki a kan Texas zuwa Mexico.