A centurion was a professional officer of the Roman army after the Marian reforms of 107 BC. Most centurions commanded groups of centuries of around 80 men but senior centurions commanded cohorts or took senior staff roles in their legion.
Phobos and Deimos are the twin sons of Ares. They ride their fathers chariot into war spreading panic and fear among mortals in the battlefield. Because their mother is Aphrodite, goddess of love, the twins also represent the fear of loss.