Snippet from Wikipedia: Hannibal

Hannibal (; 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's father, Hamilcar Barca, was a leading Carthaginian general during the First Punic War. His younger brothers were Mago and Hasdrubal; his brother-in-law was Hasdrubal the Fair, who commanded other Carthaginian armies. 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.

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Snippet from Wikipedia: Second Punic War

The Second Punic War (218 to 201 BC) was the second of three wars fought between Carthage and Rome, the two main powers of the western Mediterranean in the 3rd century BC. For 17 years the two states struggled for supremacy, primarily in Italy and Iberia, but also on the islands of Sicily and Sardinia and, towards the end of the war, in North Africa. After immense materiel and human losses on both sides, the Carthaginians were once again defeated. Macedonia, Syracuse and several Numidian kingdoms were drawn into the fighting, and Iberian and Gallic forces fought on both sides. There were three main military theatres during the war: Italy, where Hannibal defeated the Roman legions repeatedly, with occasional subsidiary campaigns in Sicily, Sardinia and Greece; Iberia, where Hasdrubal, a younger brother of Hannibal, defended the Carthaginian colonial cities with mixed success before moving into Italy; and Africa, where Rome finally won the war.

The First Punic War had ended in a Roman victory in 241 BC after 23 years and enormous losses on both sides. After the war Carthage expanded its holdings in Iberia where in 219 BC a Carthaginian army under Hannibal besieged, captured and sacked the pro-Roman city of Saguntum. In spring 218 BC Rome declared war on Carthage, beginning the Second Punic War. Later that year, Hannibal surprised the Romans by marching his army overland from Iberia, through Gaul and over the Alps to Cisalpine Gaul (modern northern Italy). Reinforced by Gallic allies he obtained crushing victories over the Romans at the battles of Trebia (218) and Lake Trasimene (217). Moving to southern Italy in 216 Hannibal defeated the Romans again at the battle of Cannae, where he annihilated the largest army the Romans had ever assembled.

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