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The Battle of Issus was a decisive victory by Septimius Severus, the future Roman emperor, over his rival Pescennius Niger. The battle took place on November 19, 194, near Issus in modern-day Turkey. Severus' army was outnumbered, but he was able to outmaneuver Niger and defeat him in a bloody battle. This victory allowed Severus to consolidate his power and become the sole ruler of the Roman Empire.