12. The Battle of Carrhae (53 BCE)
In 53 BCE, Roman general Marcus Licinius Crassus led an invasion into Parthian Mesopotamia, aiming to expand Roman influence. However, his forces were decisively defeated by Parthian general Surena near Carrhae (modern-day Harran, Turkey). The Parthian cavalry, including heavily armored cataphracts and skilled horse archers, outmaneuvered the Roman legions, resulting in the death of Crassus and the loss of approximately 20,000 Roman soldiers. This defeat halted Roman expansion eastward and significantly damaged Rome’s prestige (britannica.com).
