Gracchus went thither silent and unarmed; Flaccus called the slaves to arms and entrenched himself in the temple of Diana, while he at the same time sent his younger son Quintus to the enemy's camp in order if possible to arrange a compromise.

The latter returned with the announcement that the aristocracy demanded unconditional surrender; at the same time he brought a summons from the senate to Gracchus and Flaccus to appear before it and to answer for their violation of the majesty of the tribunes.

Gracchus wished to comply with the summons, but Flaccus prevented him from doing so, and repeated the equally weak and mistaken attempt to move such antagonists to a compromise.

When instead of the two cited leaders the young Quintus Flaccus once more presented himself alone, the consul treated their refusal to appear as the beginning of open insurrection against the government; he ordered the messenger to be arrested and gave the signal for attack on the Aventine, while at the same time he caused proclamation to be made in the streets that the government would give to whosoever should bring the head of Gracchus or of Flaccus its literal weight in gold, and that they would guarantee complete indemnity to every one who should leave the Aventine before the beginning of the conflict.
The ranks on the Aventine speedily thinned; the valiant nobility in union with the Cretans and the slaves stormed the almost undefended mount, and killed all whom they found, about 250 persons, mostly of humble rank.

Marcus Flaccus fled with his eldest son to a place of concealment, where they were soon afterwards hunted out and put to death.