 Despite the Carthaginian naval advantage, the Roman crossing of the Strait of Messina was ineffectively opposed.Two legions commanded by Claudius marched to Messana, where the Mamertines had expelled the Carthaginian garrison commanded by Hanno (no relation to Hanno the Great) and were besieged by both the Carthaginians and the Syracusans.The sources are unclear as to why, but first the Syracusans, and then the Carthaginians withdrew from the siege.