The Campaign and Conversion
According to the tradition, Andrew held the office of Stratelates, or commander, during the reign of Maximian. When a Persian army invaded the Syrian territories, the governor Antiochus entrusted him with command of the Roman forces. Before engaging the enemy, Andrew is said to have persuaded the soldiers of his small detachment to call upon Christ rather than the pagan gods, which he held to be demons, and proclaimed Jesus Christ as the God of heaven and earth. With this small force he defeated the much larger Persian host.
His victory, rather than securing his standing, exposed him: certain men denounced him to Antiochus as a Christian who had converted the soldiers under his command. Andrew was subjected to torture, and some of his soldiers were crucified while others were imprisoned.