Soldier and Confessor
The account preserved in the Orthodox synaxarion presents Zosimus as a man of the Roman military who came to faith of his own conviction. On hearing that the persecution of Christians had begun under Trajan, rather than concealing his belief he left the army, received baptism, and took up a life of prayer and charitable works.
His renunciation of military service was a public and politically charged act. By removing the insignia of his office he was understood to have abandoned his allegiance to the Emperor, and this was the formal charge laid against him before the prefect of Antioch.