Silaces (also spelled Sillakes) was a Parthian commander who fought against the Roman general and triumvir Marcus Licinius Crassus. Initially the satrap of Ichnae, a fortress in Mesopotamia, he was defeated and wounded by Crassus' forces, and fled to the Parthian court, where he informed king Orodes II (r. 57–37 BC) of the Roman invasion.[1] Silaces later commanded the Parthian contingent alongside Surena at the Battle of Carrhae in 53 BC, where Crassus was defeated and killed.[2] Crassus' defeat at Carrhae was one of the worst military defeats of Roman history.[3] Parthia's victory cemented its reputation as a formidable if not equal power with Rome.[4] While Orodes and Artavasdes II of Armenia were observing a play of The Bacchae of Euripides (c. 480–406 BC) at the Armenian court in honor of the wedding of Orodes' son Pacorus I and Artavasdes' sister, Silaces announced the news of the victory at Carrhae, and put the head of Crassus at Orodes' feet.[5] The head was given to the producer of the play, who decided to use Crassus' actual severed head in place of the stage-prop head of Pentheus.[6]