The political situation in Rome was strained; the tribunes of the plebs continued to demand that land be distributed equally to the people.
Tribunes Marcus Duillius and Gnaeus Siccius prosecuted Appius Claudius Sabinus, who was bitterly opposed to their legislation that distributed land to the people, however he died before the proceedings ended.
[3][4] The Aequi and the Sabines, taking advantage of the internal conflict in Rome, raided Roman territory.
Mamercus again supported the agrarian law of the plebeian tribunes in favour of a distribution of land to the people and was confronted by the conservative senators.
With his colleague Vibulanus, he successfully bought an end to the conflict by passing a law that the lands of the Volsci at the new Roman colony of Antium be distributed.