The Battle of the Himera River was fought in 311 BC between Carthage and Syracuse near the mouth of the Himera river (the modern Salso river). Hamilcar, grandson of Hanno the Great, led the Carthaginians, while the Syracusans were led by Agathocles. Agathocles initially surprised the Carthaginians with an attack on their camp, but the Greeks lost the battle when they were attacked by unexpected Carthaginian reinforcements. The Greek army took many casualties as it retreated. Agathocles managed to gather the remains of his army and retreat to Syracuse, but lost control of Sicily.