Saint Marcellus: Military Martyr
In the ancient Roman Empire, many Christians refused to serve in the imperial armies, finding it was in conflict with their baptismal vows and the teaching and example of Jesus.

In The Apostolic Tradition of St. Hippolytus of Rome, written in the second century and attributed to one of the first Bishops of Rome, renunciation of killing is a precondition of baptism: “A soldier under authority shall not kill a man. If he is ordered to, he shall not carry out … [Altro]