Why Did the Carthaginians Not Use Their Navy in Salombo?

The Romans were not known to be great seafaring people a great Navy their first two attempts at the Navy they just sank them. The Carthaginians never use their Navy to try to interdict the Roman landing parties. One of the things that that flobera intuited in Salombo is treason I mean the Carthaginian elite was deeply invited and they hated each other. At every key moment in this war they will betray the Barca's, he says.