He did not fear those who can kill the body but not the soul

We do not have much information about the life of Saint Sebastian. According to the Passio Santi Sebastiani Martyris, a text long attributed to Saint Ambrose of Milan (340-397), he was born around 250 A.D., and raised in Milan by his father from Narbonne and his mother from Milan. Educated in the Christian faith, he moved to Rome in 270 A.D., enlisted sometime around 283 A.D., and eventually became a tribune of the first cohort of the imperial guard. Unaware of his faith, Emperors Maximian and Diocletian entrusted him with important responsibilities.