Aristomachus (or Aristomachos) was an ancient Greek leader of the popular party at Croton, in the Hannibalian war, about 215 BC. At that time nearly all the towns of southern Italy were divided into two parties, the people being in favour of the Carthaginians, and the nobles or senators in favour of the Romans. The Bruttians, who were in alliance with the Carthaginians, had hoped to gain possession of Croton with their assistance. As this had not been done, they determined to make the conquest by themselves. A deserter from Croton informed them of the state of political parties there, and that Aristomachus was ready to surrender the town to them. The Bruttians marched with an army against Croton, and as the lower parts, which were inhabited by the people, were open and easy of access, they