Battle of the Trebia in the context of "Second Punic War"

Hannibal (/ˈhænɪbəl/; Punic: 𐤇𐤍𐤁𐤏𐤋, romanized: Ḥanībaʿl; 247 – between 183 and 181 BC) was a Carthaginian general and statesman who commanded the forces of Carthage in their battle against the Roman Republic during the Second Punic War. Hannibal lived during a period of great tension in the Mediterranean Basin, triggered by the emergence of the Roman Republic as a great power with its defeat of Carthage in the First Punic War. Revanchism prevailed in Carthage, symbolized by the pledge that Hannibal made to his father to "never be a friend of Rome".

In 218 BC Hannibal attacked Saguntum (modern Sagunto, Spain), an ally of Rome in Hispania, sparking the Second Punic War. Hannibal invaded Italy by crossing the Alps with North African war elephants. In his first few years in Italy, as the leader of a Carthaginian and partially Celtic army, he won a succession of victories at the Battle of Ticinus, Trebia, Lake Trasimene, and Cannae, inflicting heavy losses on the Romans. Hannibal was distinguished for his ability to determine both his and his opponent's respective strengths and weaknesses, and to plan battles accordingly. His well-planned strategies allowed him to conquer and ally with several Italian cities that were previously allied to Rome. Hannibal occupied most of southern Italy for 15 years. The Romans, led by Fabius Maximus, avoided directly engaging him, instead waging a war of attrition (the Fabian strategy). Carthaginian defeats in Hispania prevented Hannibal from being reinforced, and he was unable to win a decisive victory. A counter-invasion of North Africa, led by the Roman general Scipio Africanus, forced him to return to Carthage. Hannibal was defeated at the Battle of Zama, ending the war in a Roman victory.

The Battle of Lake Trasimene was fought when a Carthaginian force under Hannibal ambushed a Roman army commanded by Gaius Flaminius on 21 June 217 BC, during the Second Punic War. The battle took place on the north shore of Lake Trasimene, to the south of Cortona, and resulted in a heavy defeat for the Romans.

War had broken out between Rome and Carthage early in 218 BC. Hannibal, ruler of the Carthaginian territories in south-east Iberia, marched an army through Gaul, crossed the Alps and arrived in Cisalpine Gaul (northern Italy) later that year. The Romans rushed reinforcements north from Sicily but were badly defeated at the Battle of the Trebia.

The Battle of Cannae (/ˈkæni, -eɪ, -aɪ/; Latin: [ˈkanːae̯]) was a key engagement of the Second Punic War between the Roman Republic and Carthage, fought on 2 August 216 BC near the ancient village of Cannae in Apulia, southeast Italy. The Carthaginians and their allies, led by Hannibal, surrounded and practically annihilated a larger Roman and Italian army under the consuls Lucius Aemilius Paullus and Gaius Terentius Varro. It is regarded as one of the greatest tactical feats in military history and one of the worst defeats in Roman history, and it cemented Hannibal's reputation as one of antiquity's greatest tacticians.

Having recovered from their losses at Trebia (218 BC) and Lake Trasimene (217 BC), the Romans decided to engage Hannibal at Cannae, with approximately 86,000 Roman and allied socii troops. They massed their heavy infantry in a deeper formation than usual, while Hannibal used the double envelopment tactic and surrounded his enemy, trapping the majority of the Roman army, who were then slaughtered. Later historians and military strategists have used Cannae as an exemplary battle of annihilation. The loss of life on the Roman side meant it was one of the most lethal single days of fighting in history; historian Adrian Goldsworthy equates the death toll at Cannae to "the massed slaughter of the British Army on the first day of the Somme offensive in 1916". Only about 15,000 Romans, most of whom were from the garrisons of the camps and had not taken part in the battle, survived. Following the defeat, Capua and several other Italian city-states defected from the Roman Republic to Carthage.

Tiberius Sempronius Longus (c. 260 BC – unknown) was a Roman consul during the Second Punic War and a contemporary of Publius Cornelius Scipio (father of Scipio Africanus). In 219 BC, Sempronius and the elder Scipio were elected as consuls for 218 BC. At the outbreak of the war in 218 BC, he was ordered to conduct the war effort in Sicily and Africa, while Scipio was sent to the Iberian Peninsula to attack Hannibal himself. Sempronius was allocated two Roman legions, 16,000 allied infantry, 1,800 allied cavalry, 160 quinqueremes and 20 lighter vessels. As soon as his army was assembled he moved his forces to Sicily. Striking from Lilybaeum Sempronius captured Malta from the Carthaginians.

Shortly thereafter, with Scipio wounded and pursued by Hannibal's forces after the Battle of Ticinus, the Senate sent for Tiberius Sempronius Longus. Upon his arrival in December, and reportedly against Scipio's advice, Sempronius Longus led an ambitious attack at the Battle of the Trebia. His army charged into a trap and was enveloped by the forces of Hannibal's brother, Mago. Although it was a crushing Roman defeat, Tiberius Sempronius Longus and a force of 10,000 infantrymen fought their way through the rear Carthaginian lines and to safety.