Year 203 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Caepio and Geminus (or, less frequently, year 551 Ab urbe condita). The denomination 203 BC for this year has been used since the early medieval period, when the Anno Dominicalendar era became the prevalent method in Europe for naming years.
The Roman general, Gaius Laelius, and Rome's Numidian ally, Masinissa, follow Syphax towards Cirta, the Numidian capital. In the pursuit, Syphax is captured after his badly wounded horse throws him off. He is delivered to Scipio and is made a prisoner of the Romans, dying in the Italian town of Alba Fucens later in the year.
Masinissa becomes king of both the Massyli and the Massaesyli tribes in Numidia and remains a loyal ally to the Romans.
Hasdrubal Gisco persuades the Carthaginians to raise a new army and to send for Hannibal to return home from Italy. Hannibal finally leaves Italy and returns to Carthage.
The Carthaginian general, Mago Barca, is defeated and wounded by the Romans in a battle in Cisalpine Gaul. He dies of his wounds on the return voyage to Carthage.
A preliminary armistice between Carthage and Rome is declared and the Carthaginian armies accept Scipio's severe terms. However, on his return to Carthage, Hannibal concentrates the remnants of the Carthaginian forces at Hadrumetum (modern Sousse, Tunisia) and prepares them for battle.
Quintus Fabius Maximus Verrucosus, Roman general and statesman whose cautious delaying tactics (which have led to his surname Cunctator, meaning "delayer") during the early stages of the Second Punic War has given Rome time to recover its strength and take the offensive against the invading Carthaginian army of Hannibal (b. c. 275 BC)
Syphax, Numidian king allied with the Carthaginians during the Second Punic War against Rome