The Battle of Ticinus was fought between the Carthaginian forces of Hannibal and a Roman army under Publius Cornelius Scipio in late November 218 BC as part of the Second Punic War. It took place in the flat country on the right bank of the river Ticinus, to the west of modern Pavia in northern Italy. Hannibal led 6,000 Libyan and Iberian cavalry, while Scipio led 3,600 Roman, Italian and Gallic cavalry and a large but unknown number of light infantry javelinmen.

War had been declared early in 218 BC over perceived infringements of Roman prerogatives in Iberia (modern Spain and Portugal) by Hannibal. Hannibal had gathered a large army, marched out of Iberia, through Gaul (modern France) and over the Alps into Cisalpine Gaul (northern Italy), where many of the local tribes were opposed to Rome. The Romans were taken by surprise, but one of the consuls for the year, Scipio, led an army along the north bank of the Po with the intention of giving battle to Hannibal. The two commanding generals each led out strong forces to reconnoitre their opponents. Scipio mixed many javelinmen with his main cavalry force, anticipating a large-scale skirmish. Hannibal put his close-order cavalry in the centre of his line, with his light Numidian cavalry on the wings.

On sighting the Roman infantry the Carthaginian centre immediately charged and the javelinmen fled back through the ranks of their cavalry. A large cavalry melee ensued: many cavalry dismounted to fight on foot and some of the Roman javelinmen reinforced the fighting line. This continued indecisively until the Numidians swept round both ends of the line of battle. They then attacked the still disorganised javelinmen; the small Roman cavalry reserve, to which Scipio had attached himself; and the rear of the already engaged Roman cavalry. All three of these Roman forces were thrown into confusion and panic.

The Romans broke and fled, with heavy casualties. Scipio was wounded and only saved from death or capture by his 16-year-old son. That night Scipio broke camp and retreated over the Ticinus; the Carthaginians captured 600 of his rearguard the next day. After further manoeuvres Scipio established himself in a fortified camp to await reinforcements while Hannibal recruited among the local Gauls. When the Roman reinforcements arrived in December under Tiberius Longus, Hannibal heavily defeated him at the battle of the Trebia. The following spring, strongly reinforced by Gallic tribesmen, the Carthaginians moved south into Roman Italy. Hannibal campaigned in southern Italy for the next 12 years.

Background Iberia

The First Punic War was fought between Carthage and Rome, the two main powers of the western Mediterranean in the 3rd century BC. They struggled for supremacy primarily on the Mediterranean island of Sicily and its surrounding waters, and also in North Africa. The war lasted for 23 years, from 264 to 241 BC, until the Carthaginians were defeated. The Treaty of Lutatius was signed by which Carthage evacuated Sicily and paid an indemnity of 3,200 talents over ten years. Four years later, when Carthage was weakened by the mutiny of part of its army and the rebellion of many of its African possessions, Rome seized Sardinia and Corsica on a cynical pretence and imposed a further 1,200 talent indemnity. The annexation of Sardinia and Corsica by Rome and the additional financial imposition fuelled resentment in Carthage. The contemporary Greek historian Polybius considered this act of bad faith by the Romans to be the single greatest cause of war with Carthage breaking out again nineteen years later.

Shortly after Rome's breach of the treaty the leading Carthaginian general Hamilcar Barca led many of his veterans on an expedition to expand Carthaginian holdings in south-east Iberia (today Iberia consists of Spain and Portugal); this was to become a quasi-monarchial, autonomous Barcid fiefdom. Carthage gained silver mines, agricultural wealth, manpower, military facilities such as shipyards, and territorial depth which encouraged it to stand up to future Roman demands. Hamilcar ruled as a viceroy and was succeeded by his son-in-law, Hasdrubal, in 229BC and then his son, Hannibal, eight years later. In 226 BC the Ebro Treaty was agreed with Rome, specifying the river Ebro as the northern boundary of the Carthaginian sphere of influence. A little later Rome made a separate treaty with the city of Saguntum, which was situated well south of the Ebro. In 218 BC a Carthaginian army under Hannibal besieged, captured and sacked Saguntum and early the following year Rome declared war on Carthage.

Cisalpine Gaul Since the end of the First Punic War Rome had also been expanding, especially in the area of north Italy either side of the river Po known as Cisalpine Gaul. Roman attempts to establish towns and farms in the region from 232 BC led to repeated wars with the local Gallic tribes, who were finally defeated in 222BC. In 218BC the Romans pushed even further north, establishing two new towns, or "colonies", on the Po and appropriating large areas of the best land. Most of the Gauls simmered with resentment at this intrusion. The major Gallic tribes in Cisalpine Gaul attacked the Roman colonies there, causing the Romans to flee to their previously established colony of Mutina (modern Modena), where they were besieged. A Roman relief army broke through the siege, but was then ambushed and itself besieged in Tannetum.

It was the long-standing Roman procedure to elect two men each year, known as consuls, to each lead an army. In 218 BC the Romans raised an army to campaign in Iberia under the consul Publius Scipio, who was accompanied by his brother Gnaeus. The Roman Senate detached one Roman and one allied legion from the force intended for Iberia to reinforce the Roman position in northern Italy. The Scipios had to raise fresh troops to replace these and thus could not set out for Iberia until September. At the same time another Roman army in Sicily under the consul Sempronius Longus was preparing for an invasion of Carthaginian Africa.

Carthage invades Italy

Meanwhile, Hannibal assembled a Carthaginian army in New Carthage (modern Cartagena) over the winter, marching north in May 218 BC. He entered Gaul to the east of the Pyrenees, then took an inland route to avoid the Roman allies along the coast. Hannibal left his brother Hasdrubal Barca in charge of Carthaginian interests in Iberia. The Roman fleet carrying the Scipio brothers' army landed at Rome's ally Massalia (modern Marseille) at the mouth of the Rhone in September, at about the same time as Hannibal was fighting his way across the river against a force of local Gauls at the battle of Rhone Crossing. A Roman cavalry patrol scattered a force of Carthaginian cavalry, but Hannibal's main army evaded the Romans and Gnaeus Scipio continued to Iberia with the Roman force; Publius returned to northern Italy to coordinate the immediate Roman response there. The Carthaginians crossed the Alps with 38,000 infantry and 8,000 cavalry in October 218 BC, surmounting the difficulties of climate, terrain and the guerrilla tactics of the native tribes.

Hannibal arrived with 20,000 infantry, 6,000 cavalry and 37 elephants in what is now Piedmont, northern Italy. The Romans had already withdrawn to their winter quarters and were astonished by Hannibal's appearance. His surprise entry into the Italian peninsula led to the cancellation of Rome's planned invasion of Africa by an army under Longus. The Carthaginians needed to obtain supplies of food, as they had exhausted their reserves. They also wished to obtain allies among the north-Italian Gallic tribes from which they could recruit, as Hannibal believed that he required a larger army if he were to effectively take on the Romans. The local tribe, the Taurini, were unwelcoming, so Hannibal promptly besieged their capital, (near the site of modern Turin) stormed it, massacred the population and seized the supplies there. The modern historian Richard Miles believes that with these brutal actions Hannibal was sending out a clear message to the other Gallic tribes as to the likely consequences of non-cooperation.

Hearing that Publius Scipio was operating in the region, he assumed the Roman army in Massala which he had believed en route to Iberia had returned to Italy and reinforced the army already based in the north. Believing he would therefore be facing a much larger Roman force than he had anticipated, Hannibal felt an even more pressing need to recruit strongly among the Cisalpine Gauls. He determined that a display of confidence was called for and advanced boldly down the valley of the Po. However, Scipio led his army equally boldly against the Carthaginians, causing the Gauls to remain neutral. Both commanders attempted to inspire the ardour of their men for the coming battle by making fiery speeches to their assembled armies. Hannibal is reported to have stressed to his troops that they had to win, whatever the cost, as there was no place they could retreat to.

After camping at Piacenza, a Roman colony founded earlier that year, the Romans created a pontoon bridge across the lower river Ticinus (the modern Ticino) and continued west. When his scouts reported the nearby presence of Carthaginians, Scipio ordered his army to encamp. The Carthaginians did the same. Next day each commander led out a strong force to personally reconnoitre the size and make up of the opposing army, about which they would have been almost completely ignorant.

Opposing forces

Anticipating an engagement as he closed with the Romans, Hannibal had recalled all of his scouts and raiding parties and took with him an exclusively cavalry force which included almost all of his 6,000-strong mounted contingent. Carthage usually recruited foreigners to make up its army. Many were from North Africa, and are usually referred to as Libyans; the region provided two main types of cavalry: close-order shock cavalry (also known as "heavy cavalry") carrying spears; and light cavalry skirmishers from Numidia who threw javelins from a distance and avoided close combat. Iberia also provided experienced cavalry: unarmoured close-order troops referred to by the ancient historian Livy as "steady", meaning that they were accustomed to sustained hand-to-hand combat rather than hit and run tactics. Hannibal's cavalry contingent would have consisted almost entirely of these three types, but the numbers of each are not known.

Most male Roman citizens were liable for military service and would serve as infantry, with a better-off minority providing a cavalry component. Traditionally, when at war the Romans would raise two or more legions, each of 4,200 infantry and 300 cavalry. Approximately 1,200 of the infantry in each legion, poorer or younger men unable to afford the armour and equipment of a standard legionary, served as javelin-armed skirmishers, known as velites. They carried several javelins, which would be thrown from a distance, a short sword, and a shield. An army was usually formed by combining one or several Roman legions with the same number of similarly sized and equipped legions provided by their Latin allies; allied legions usually had a larger attached complement of cavalry than Roman ones. Scipio's army consisted of four legions, with approximately 16,000 infantry and 1,600 cavalry. A further 2,000 Gallic cavalry and many Gallic infantry were also serving with the Romans. Scipio led out all of his 3,600 cavalry and, anticipating that they would be outnumbered, supplemented them with a large but unknown number of the 4,500 or so available velites.

Battle