Ambrose was a functionary for the Roman government in Milan. There was a dispute between some Arians and some Catholics over who should Be the next bishop of Milan, a Catholic or an Arian. Rioting broke out and Ambrose went to settle things down. During the time that Ambrose was trying to calm things a child’s voice was heard to say, “Ambrose for bishop.” The crowd voiced its approval and the clergy agreed. He was then ordained deacon, priest, and bishop as @twf said needed to happen.