After the battle of Carrhae 53 BC. This was an important battle between the Parthian Empire and the Roman Republic, it was fought near the town of Carrhae, in 53 BC. The Parthian Spahbod Surena decisively defeated a superior Roman invasion force, led by Marcus Licinius Crassus. Carrhae Harran was a major ancient city in Upper Mesopotamia whose site is near the modern village of Altınbaşak, Turkey, 24 miles southeast of Şanlıurfa (ancient Edessa).
"The Parthian shot was a military tactic made famous by the Parthians, an ancient Iranian people. The Parthian archers mounted on light horse, while retreating at a full gallop, would turn their bodies back to shoot at the pursuing enemy. The maneuver required superb equestrian skills, since the rider's hands were occupied by his bow."
The Battle of Carrhae was fought in 53 BC between the Roman Republic and the Parthian Empire near the town of Carrhae. The Parthian Spahbod ("General") Surena the Iranian 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, 53 BC. The legionaries then formed the testudo formation, in which they locked their shields together to present a nearly impenetrable front to missiles. However, this formation severely restricted their ability to fight in melee combat. The Parthian cataphracts exploited this weakness and repeatedly charged the Roman line, causing panic and inflicting heavy casualties.