Alamanni

[Robert Vermaat]

Many military units panic after their commander is injuried.
Do your sources tell how they were being employed, or how Julian used them after he got them turned around?

Yes, but they are chastised by Ammianus because he felt their was not enough cause for them to flee.
Ammianus never returns to the cavalry, but I've read that Zosimus tells how they were punished by being dressed in women's clothing, and how they later regained their honour. That tells me they were not of much use during the rest of the battle.

We ought not however to pass over in silence an action of Caesar after the victory. He possessed a regiment of six hundred horse, which were well disciplined, and in whose valour and experience he so confided, that he ventured great partof his hopes upon their performances. Indeed when the battle commenced, the whole army attacked the enemy with all the resolution they could show; but some time afterwards, though the Roman army had considerably the advantage, these were the only troops that fled, and left their station so dishonourably, that when Caesar rode up to them with a small party, and called them back to a share of the victory, he could not by any means prevail on them to turn. On which account he was justly indignant with them, for having as much as related to them betrayed their countrymen to the Barbarians. Yet he did not inflict on them the usual and legal punishment. But he dressed them in.women's clothes, and led them through the camp towards another province, thinking that such a punishment would be worse than death to soldiers that were men. Indeed this happened very fortunately both for him and them; for in the second war against the Germans they recollected the ignominy which had previously been imposed upon them,and were almost the only troops who conducted themselves bravely in that engagement.