Alexander's Campaign > Battle of Issus

Battle of Issus

Alexander the Great - Dove Decoration


The Battle of Issus, fought in November 333 BCE, was one of the key engagements during Alexander the Great's campaign against the Persian Empire. Here’s a detailed description of the battle:

Prelude: After his victory at the Battle of Granicus, Alexander moved through Asia Minor (modern-day Turkey) securing his supply lines and capturing coastal cities to deprive the Persian navy of bases. Meanwhile, King Darius III of Persia gathered a large army to confront Alexander.

Geography: The battle took place near the town of Issus, which is in modern-day southern Turkey, close to the Mediterranean coast. The narrow coastal plain between the mountains and the sea was significant in limiting the movement of the large Persian army, negating their numerical advantage.


Macedonian Army: Alexander's forces numbered around 40,000, consisting of a mix of Macedonian phalanx infantry, companion cavalry, archers, and light infantry.Persian Army: Darius III commanded a much larger force, estimated to be between 60,000 and 100,000, including Persian infantry, cavalry, and Greek mercenaries.

Battle Strategy

Alexander’s Tactics: Alexander deployed his army with the phalanx in the center, cavalry on the right flank, and additional troops on the left. He personally led the cavalry on the right flank.

Darius’s Tactics: Darius positioned his troops with the bulk of his infantry in the center, flanked by cavalry. He placed himself in the center, which was a traditional but risky position for a commander.

Course of the Battle

Initial Engagement: The battle began with skirmishes and missile exchanges. Alexander quickly noticed the weak Persian left flank and decided to exploit this.Flanking Maneuver: Alexander led a direct cavalry charge against the Persian left, causing significant disruption and breaking through their lines.

Phalanx Advance: Simultaneously, the Macedonian phalanx engaged the Persian center, pushing forward with their long spears (sarissas) and disciplined formation.

Darius’s Flight: As the Macedonian cavalry approached Darius’s position, he panicked and fled the battlefield. His retreat caused disarray among the Persian troops, leading to a full-scale rout.


Casualties: Macedonian casualties were relatively light compared to the Persians, who suffered heavy losses both in terms of dead and captured soldiers.

Significance: The victory at Issus was a major psychological blow to the Persian Empire. It demonstrated Alexander's tactical brilliance and the effectiveness of the Macedonian army. Darius’s flight also resulted in his family being captured by Alexander, further demoralizing Persian forces.

Strategic Gains: Following the battle, Alexander secured control over Asia Minor and continued his advance into the heart of the Persian Empire. The victory at Issus set the stage for further conquests, including the eventual capture of the Persian capitals of Babylon, Susa, and Persepolis.

In summary, the Battle of Issus was a pivotal moment in Alexander the Great's campaign against Persia, marked by strategic ingenuity and decisive action that led to a significant Macedonian victory and further solidified Alexander's reputation as a formidable military commander.

Alexander's Campaign

Balkan Campaign

+ Balkan Battles

Persian Campaign

+ Persian Battles

Indian Campaign

+ Indian Campaign Battles


Abbott, J. (1848). Alexander the Great. New York & London: Harper & Brothers

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