A prepared plain
Darius levels the ground to make scythed chariots and cavalry usable. This spatial advantage gives breadth to the Persian line, but also increases the distance between its wings and centre when one wing follows the Macedonian right.
Battle
Gaugamela
1 October 331 BC
Alexander's right opens a gap while Parmenion holds a pressured left.
Military history
How does Alexander reach Darius while containing the breadth of the Persian deployment?
Gaugamela cannot be reduced to Alexander's charge. Darius deploys a broader force on a plain levelled for his chariots and cavalry; Alexander shifts his right, holds the phalanx in the centre, and leaves a second line to protect the rear against encirclement. Javelinmen and Agrianians help manage the intervals, while the phalanx ranks open and then close passages for the chariots. When Persian cavalry is drawn towards the wings, a gap appears: the Companions and phalanx converge on Darius, but Mazaeus's right wing simultaneously presses Parmenion's left and Persian and Indian troops reach the camp and baggage.
A shortened Macedonian line
Alexander commands the right, the phalanx holds the centre, and Parmenion directs the left, including the Thessalian cavalry. A second infantry line protects the rear against Persian envelopment; it is a functional deployment, not a decorative reserve.
Two crises at once
The gap near the centre enables the charge towards Darius. At the same time, Mazaeus's right wing breaks into the Macedonian left and Persian and Indian troops penetrate as far as the camp, where they plunder the baggage instead of immediately turning against the line.
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Chronological dossier
GranicusHow did an immediate attack across a river turn an obstacle into a point that fixed the Persian cavalry?IssusHow did the narrow battlefield prevent Darius from fully exploiting his mass while exposing Alexander to a rupture of his centre?Siege of TyreHow did a land army progressively turn an island siege into a combined operation?HydaspesHow did Alexander secure a contested crossing and then neutralise elephants and cavalry without losing cohesion?
Military history
Sources
Indirect ancient primary sourceArrien, Anabase d’Alexandre
Livre III, chapitres 14–15 : déploiement et bataille ; première poursuite de Darius, message attribué à Parmenion, retour et rencontre des cavaliers perses en retraite, reprise de la poursuite, repos au Lycus et départ à minuit vers Arbèles.
Principal narrative sequence, checked against Iranica's critical reservations about transmission of the accounts.
View ↗Institutional academic control synthesisErnst Badian, Encyclopaedia Iranica, “Gaugamela”
Vol. X, fasc. 3, pp. 332–333, paragraphes sur le déploiement, la seconde ligne, les chars, la brèche, la poursuite de Darius, la pression de Mazaios sur Parmenion et la pénétration perse/indienne au camp ; bibliographie des sources antiques.
Principal historical control: wings of Parmenion and Mazaeus, second line, gap, camp/baggage, uncertainty over Parmenion's appeal and Alexander's reaction, and reservations about the ancient sources.
View ↗Institutional academic control synthesisErnst Badian, Encyclopaedia Iranica, “Mazaeus”
§ “Gaugamela and Babylon” : Mazaios à la droite perse avec la meilleure cavalerie ; troupes légères, Cadusiens et Scythes envoyés par la brèche vers le camp ennemi plusieurs milles derrière la ligne ; pression sur Parmenion, puis repli et reddition de Babylon.
Check of the identity of Mazaeus's right wing, its position opposite Parmenion, and the distinct axis of the raid towards the Macedonian camp.
View ↗Academic article on historical topographyKleanthis Zouboulakis, “The Topography of the Battle of Gaugamela”
Pharos 21/2 (2015), pp. 31–62 : discussion des hypothèses de localisation et des relations entre terrain, orientation et récit antique.
Cartographic debate and caution over the battlefield's modern geometry.
View ↗Specialist cartographic sourceJona Lendering, Map of the Battle of Gaugamela
Carte comparative des positions, ailes, centre de Darius et axes de mouvement ; utilisée comme contrôle de lisibilité relative, avec une fonction distincte de celle d’une preuve de géolocalisation.
Graphic relationship among the two lines, the Macedonian right's charge, and depth to the camp.
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