The Roman History · Amm. 31.2.8

Sometimes when provoked, they fight; and when they go into battle, they form in a solid body, and utter all kinds of terrific yells. They are very quick in their operations, of exceeding speed, and fond of surprising their enemies. With a view to this, they suddenly disperse, then reunite, and again, after having inflicted vast loss upon the enemy, scatter themselves over the whole plain in irregular formations: always avoiding a fort or an entrenchment.

Ammianus Marcellinus · translated by C. D. Yonge · 1911 reprint
C. D. Yonge translation (preface dated February 1862); G. Bell and Sons, 1911; Project Gutenberg #28587
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