Plutarch, Galba
Bernadotte Perrin, Ed.

[4] And now they were there to enforce their just rights as soldiers, and would not suffer the emperor to be seen or heard by those who came to meet him, but with tumultuous shouts demanded standards for their legion and regular quarters. When Galba put off their demand and told them to renew it at another time, they declared that the postponement was merely a way of refusing their demands, and were incensed, and followed along with unremitted shouts. Some actually drew their swords, and then Galba ordered his horsemen to charge upon them. Not a man of them stood his ground, but some were done to death at once in the rout, and others as they fled, nor was it a happy and auspicious omen that Galba should enter the city through so much slaughter and so many dead bodies. But whereas many had before this despised him and looked upon him as a weak old man, now all regarded him with shuddering fear.