Rubuta ci gaba don wannan sakin layi - A cikin 1903, bayan kammala karatunsa daga Makarantar Tsaron Jirgin Ruwa a Fort Totten, New York, an nada Lyon a matsayin Injiniyan Injiniya a Fort Barrancas, Florida, matsayin da ya riƙe har zuwa 1906. Daga 1906 zuwa 1907, Lyon ya yi aiki a cikin Philippine-American War
a kan Moros.