The two parties collaborated in only one instance. There was no Roman assistance when Pyrrhus campaigned in Sicily and no Carthaginian assistance when Pyrrhus returned to Italy. Diodorus Siculus wrote that after making the alliance and before Pyrrhus' crossing from Italy to Sicily, the Carthaginians took 500 Roman legionaries on board their ships and sailed across to Rhegium (presumably from Sicily). They besieged the rebel Roman garrison which had seized the city (see above), but gave the siege up, but not before setting fire to some timber which had been gathered for shipbuilding. They remained and kept a watch on the narrow Strait of Messina between Italy and Sicily, looking out for any attempt by Pyrrhus to cross it. This must have been the first action against the rebel Roman garrison at Rhegium. The consul Gaius Fabricius Luscinus eventually defeated the garrison and restored the city to its people.