Res Gestae

Then the lines dashed together like beaked ships, pushing each other back and forth in turn, and tossed about by alternate movements, like waves at sea. And because the left wing, which had made its way as far as the very wagons, and would have gone farther if it had had any support, being deserted by the rest of the cavalry, was hard pressed by the enemy’s numbers, it was crushed, and overwhelmed, as if by the downfall of a mighty rampart. The foot-soldiers thus stood unprotected, and their companies were so crowded together that hardly anyone could pull out his sword or draw back his arm. Because of clouds of dust the heavens could

But when the barbarians, pouring forth in huge hordes, trampled down horse and man, and in the press of ranks no room for retreat could be gained anywhere, and the increased crowding left no opportunity for escape, our soldiers also, showing extreme contempt of falling in the fight, received their death-blows, yet struck down their assailants; and on both sides the strokes of axes split helmet and breastplate.