Kammala jumla mai zuwa: A ranar 10 ga Mayu, 1898, yayin da Chanler yake a Tampa, an ba shi kwamiti a matsayin kyaftin da mataimakin mataimakin janar a kan ma'aikatan Manjo Janar Joseph Wheeler, wanda ya karɓa. Ya yi aiki a matsayin jami'in bindigogi, Rundunar Sojoji, Rundunar Sojoji ta Biyar, daga ranar 23 ga Mayu zuwa 23 ga Agusta, 1898. A watan Yuni da Yuli 1898 ya yi yaƙi a Yaƙin Las Guasimas, Yaƙin El Caney, a
San Juan Hill, kuma a cikin Siege na Santiago de Cuba, wanda ya sami yabo daga Major General Wheeler don "gallantry a yaƙi". An sallame shi da girmamawa a ranar 3 ga Oktoba, 1898.