As for Sulla, be at once received deputations and invitations from the other cities, but Athens was compelled by the tyrant Aristion to side with Mithridates. Against this city, therefore, Sulla led up all his forces, and investing the Piraeus, laid siege to it, bringing to bear upon it every sort of siege-engine, and making all sorts of assaults upon it. And yet if he had been patient a little while, he might have captured the upper city without hazard, since it lacked the necessities of life and was already reduced by famine to the last extremity. But since he was eager to get back to Rome, and feared the spirit of revolution there, he ran many risks, fought many battles, and made great outlays that he might hasten on the war, in which, not to speak of his other munitions, the operation of the siege-engines called for ten thousand pairs of mules, which were employed daily for this service.