Battle of Trebia

Fought in Italy in 218 BC, the battle of Trebia was a major battle between the Carthaginian army led by Hannibal and the Roman army under Sempronius Longus, a battle that cannot be ignored in the biggest events of the Second Punic War. Before that, the Carthaginians had cleverly captured a supply depot to serve as a distraction, luring the Romans into war at Trebia. They were drawn into battle after a grueling journey without food, resulting in most of them being unable to fight well. Sempronius Longus's 40,000 infantry were lined up in thirds with 4,000 cavalries at his side. On the other hand, Hannibal had a combination of African, Celtic, and Spanish infantry, 10,000 cavalries, and his famously effective war elephants at the front.

In the battle of Trebia, Hannibal's Cavalry broke through with a smaller number of enemies and then attacked most of the Romans from the front and sides. To further reinforce the Carthaginian attack, the Romans were also attacked in the rear by a hidden detachment led by Hannibal's younger brother. Overall, the Romans suffered heavy losses as only 20,000 of the 40,000 were able to retreat to safety. It was the first major battle of the Second Punic War, fought between the Carthaginian forces of Hannibal and a Roman army under Sempronius Longus on 22 or 23 December 218 BC.

• Time: 218 BC