Kammala jumla mai zuwa: A shekara ta 1903, bayan kammala karatunsa daga Makarantar Tsaro na Submarine a Fort Totten, New York, an nada Lyon a matsayin Injin Injin Artillery a Fort Barrancas, Florida, matsayin da ya rike har zuwa 1906. Daga 1906 zuwa 1907, Lyon ya yi aiki a cikin
Philippine-American War da Moros.