Dojo Darelir, the School of Xenograg the Sorcerer

Standard Battle Array of Ancient Armies

Ancient armies faced a perennial tension between breadth and depth of deployment to avoid the twin perils of penetration and encirclement. However, even small armies used many more ranks than would allow the men at the back to fight directly, and depths increased greatly in larger forces. This was a key reason why raw numbers were less important than other factors, and it also meant that battle line frontages did not vary anything like as much as the size of armies themselves. There were some cases in which one or both sides were caught by surprise and deployed their forces piecemeal, but most big ancient engagements involved the prior arraying of the opposing lines in a remarkably formalized fashion. The standard battle array placed the heavy infantry in the centre, with light infantry and perhaps elephants in front, and cavalry on the flanks. Each army would usually attack with some parts of its line, while resisting enemy superiority elsewhere. Offensive elements that achieved a breakthrough might turn against the flank or rear of other enemy contingents. Defensive sections of the line might be held back in an oblique order to delay combat, or they might retire in the face of enemy pressure in order to trade space for time and perhaps draw the enemy forward into an encirclement. Greek and Hellenistic armies tended to attack on one flank and defend on the other (producing either a head-on clash or a ‘revolving door’ engagement), while Roman and Punic deployments tended to involve a more even balance between the two wings, leading to more symmetrical double envelopments by the side with cavalry superiority.

Philip Sabin, Lost Battles, p. 222

Emphasis mine.

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