Battle fo the Trebbia: First major battle of the war. Hannibal tricked Sempronius, one of the consuls, into a battle on his terms, with an unrested and unfed army. His Numidian cavalry led the Romans on a wild chase, before Hannibal's main army advanced, the much better prepared Carthaginians, accompanied by Baleriac slingers, dealt heavy losses to the Romans. Mago, Hannibal's younger brother, led an ambush force that further damaged the army. 15000 romans were killed, with up to 15000 more captured. 10000 managed to escape back to Placentia. The Cartheginians had only suffered 5000 casualties.