Sertorius (15.2-16.1)

However, when word came that Pompey was crossing the Pyrenees, the soldiers caught up their arms and snatched up their standards and made an outcry against Perpenna, ordering him to lead them to Sertorius, and threatening, if he did not, to abandon him and go by themselves to a man who was able to save himself and save those under him. So Perpenna yielded and led them off and joined Sertorius with fifty-three cohorts.

Sertorius, then, since all the peoples within the river Ebro were unitedly taking up his cause, had an army of great numbers, for men were all the while coming to him in streams from every quarter; but he was troubled by their barbaric lack of discipline and their overconfidence, since they called loudly upon him to attack the enemy and were impatient at his delay, and he therefore tried to pacify them by arguments.