Surena or Suren, also known as Rustaham Suren was a Parthian spahbed during the first century BC. He was the leader of the House of Suren and was best known for defeating the Romans in the Battle of Carrhae. Under his command, the Parthians decisively defeated a numerically superior Roman invasion force under the command of Marcus Licinius Crassus. It is commonly seen as one of the earliest and most important battles between the Roman and Parthian empires and one of the most crushing defeats in Roman history.

The Battle of Carrhae was fought in 53 BC between the Roman Republic and the Parthian Empire near the ancient town of Carrhae. An invading force of seven legions of Roman heavy infantry under Marcus Licinius Crassus was lured into the desert and decisively defeated by a mixed cavalry army of heavy cataphracts and light horse archers led by the Parthian general Surena. On such flat terrain, the Legion proved to have no viable tactics against the highly-mobile Parthian horsemen, and the slow and vulnerable Roman formations were surrounded, exhausted by constant attacks, and eventually crushed. Crassus was killed along with the majority of his army. It is commonly seen as one of the earliest and most important battles between the Roman and Parthian Empires and one of the most crushing defeats in Roman history. According to the poet Ovid in Book 6 of his poem Fasti, the battle occurred on 9 June.