Hannibal's crossing of the Alps

Hannibal's crossing of the Alps in 218 BC was one of the major events of the Second Punic War, and one of the most celebrated achievements of any military force in ancient warfare.Lancel, Serge, ''Hannibal'', p
71
/ref> Hannibal managed to lead his Carthaginian army over the Alps and into Italy to take the war directly to the Roman Republic, bypassing Roman and allied land garrisons and Roman naval dominance.

Background

After the final Carthaginian naval defeat at the Aegates Islands,Walbank 1979, p. 187 the Carthaginians surrendered and accepted defeat in the First Punic War. Hamilcar Barca (Barca meaning ''lightning''),Dodge 1994, p. 131 a leading member of the patriotic Barcine party in Carthage and a capable general in the First Punic War, sought to remedy the losses that Carthage had suffered in Sicily to the Romans. In addition to this, the Carthaginians (and Hamilcar personally)Walbank 1979, p. 189 were embittered by the loss of Sardinia. After the Carthaginians' loss of the war, the Romans imposed terms upon them that were designed to reduce Carthage to a tribute-paying city to Rome and simultaneously strip it of its fleet.Delbrück 1990, p. 303 While the terms of the peace treaty were harsh, the Romans did not strip Carthage of her strength; Carthage was the most prosperous maritime trading port of its day, and the tribute that was imposed upon them by the Romans was easily paid off on a yearly basis while Carthage was simultaneously engaged by Carthaginian mercenaries who were in revolt.

The Carthaginian Barcine party was interested in conquering Iberia, a land whose variety of natural resources would fill its coffers with sorely needed revenueDelbrück 1990, p. 312 and replace the riches of Sicily that, following the end of the First Punic War, were now flowing into Roman coffers. In addition, it was the ambition of the Barcas, one of the leading noble families of the patriotic party, to establish the Iberian peninsula as a base of operations for waging a war of revenge against the Roman military alliance. Those two things went hand in hand, and in spite of conservative opposition to his expedition, Hamilcar set out in 238 BCDodge 1994, p. 146Paton 1922, p. 243 to begin his conquest of the Iberian peninsula with these objectives in mind. Marching west from Carthage towards the Pillars of Hercules,Walbank 1979, p. 111 where his army crossed the strait and proceeded to subdue the peninsula, in the course of nine years Hamilcar conquered the south-eastern portion of the peninsula. His administration of the freshly conquered provinces led Cato the Elder to remark that "there was no king equal to Hamilcar Barca."

In 228 BC, Hamilcar was killed, witnessed by Hannibal,Mommsen 1862, p. 94 during a campaign against the Celtic natives of the peninsula. The commanding naval officer, who was both Hamilcar's son in law and a member of the Patriotic party – Hasdrubal "The Handsome" – was awarded the chief command by the officers of the Carthaginian Iberian army.Dodge 1994, p. 147 There were a number of Grecian colonies along the eastern coast of the Iberian peninsula, the most notable being the trade emporium of Saguntum. These colonies expressed concern about the consolidation of Carthaginian power on the peninsula, which Hasdrubal's deft military leadership and diplomatic skill procured. For protection, Saguntum turned to Rome; Rome sent a garrison to the city and a diplomatic mission to Hasdrubal's camp in Cartagena, informing him that the Iberus (modern day Ebro) river must be the limit of the Carthaginian advance in Spain.Paton 1922, p. 273 The conclusion of the treaty and the embassy were sent to Hasdrubal's camp in 226 BC.Mommsen 1862, p. 92

In 221 BC, Hasdrubal was killed by an assassin.Walbank 1979, p. 190Dodge 1994, p. 148Paton 1922, p. 331 It was in that year that the officers of the Carthaginian army in Iberia expressed their high opinion of Hamilcar's 26-year-old son, Hannibal, by electing him to the chief command of the army. Having assumed the command (retroactively confirmed by the Carthaginian Senate) of the army that his father had wielded through nine years of hard mountain fighting, Hannibal declared that he was going to finish his father's project of conquering the Iberian peninsula, which had been the first objective in his father's plan to bring a war to Rome in Italy and defeat it there.

Hannibal spent the first two years of his command seeking to complete his father's ambition while simultaneously putting down several potential revolts that resulted in part from the death of Hasdrubal, which menaced the Carthaginian possessions already conquered thus far. He attacked the tribe known as the Olcades and captured their chief town of Althaea. A number of the neighbouring tribes were astonished at the vigour and rapacity of this attack, as a result of which they submitted to the Carthaginians. He received tribute from all of these recently subjugated tribes, and marched his army back to Cartagena, where he rewarded his troops with gifts and promised more gifts in the future. During the next two years, Hannibal successfully reduced all of Iberia south of the Ebro to subjection, excepting the city of Saguntum, which, under the aegis of Rome, was outside of his immediate plans. Catalonia and Saguntum were now the only areas of the peninsula not in Hannibal's possession.Dodge 1994, p. 157

Roman foreign relations

Hannibal was informed of Roman politics, and saw that this was the opportune time to attack. He had Gallic spies in every corner of the Roman Republic, even within the inner circles of the Senate itself.Mommsen 1862, p. 95 The Romans had spent the years since the end of the First Punic War (264-241 BC)Mommsen 1862, p. 62 tightening their grip on the peninsula by taking important geographical positions in the peninsula in addition to extending Rome's grip on Sicily, Corsica and Sardinia.

In addition to this, the Romans had been at war with the Padane Gauls off and on for more than a century.Paton 1922, p. 287 The Boii had waged war upon the Romans in 238 BC, a war that lasted until 236 BC.Mommsen 1862, p. 77 In 225 BC, the natives of northern Italy, seeing that Rome was again moving aggressively to colonize their territory, progressed to the attack,Mommsen 1862, p. 78 but were defeated.Paton 1922, p. 317 The Romans were determined to drive their borders right up to the Alps.Paton 1922, p. 319 In 224 BC, the Boii submitted to Roman hegemony, and the next year the Anari also submitted to the Romans.Mommsen 1862, p. 81 In 223 BC, the Romans engaged in another battle with the Gauls, this time the Insubres.Mommsen 1862, p. 82 The Romans at first sustained significant losses against the Insubres while they were attempting to cross a ford near the junction of the Po and the Adda. After encamping in this country for some days without taking any decisive action, the Roman consul on the spot decided to negotiate a settlement with the Insubres. Under the terms of this freshly negotiated truce, the Romans marched out with full honours into the territory of their allies, the Cenomani. However, once they were safe within the territory of the Cenomani, the Romans again marched their army into the territory of the Insubres and were victorious.Paton 1922, p. 321

In 222 BC, the Celts sent an embassy to the Roman Senate, pleading for peace. Seeing an opportunity for a triumph for themselves, the consuls (Marcus Claudius and Gnaeus Cornelius) vigorously rejected the embassy, and the Gauls prepared for war with the Romans. They hired 30,000 mercenaries from beyond the Alps and awaited the arrival of the Romans.Paton 1922, p. 325 When the campaigning season began, the consular legions were marched into the Insubres territory again. A vigorous combat took place near Mediolanum, which resulted in the leaders of the Gallic revolt turning themselves over to the Romans. With this victory, the Padane Gauls were unhappily subdued, and ripe for revolt.

Preparations

Hannibal, aware of the situation, sent a number of embassies to the Gallic tribes in the Po valley. In 220 BC, he had begun to communicate intimately with the Padane Gauls (called the "Padane Gauls" because the Po in this era was called the "Padus" by the Romans), and these embassies brought with them offers of money, food and guides to the Carthaginian.Dodge 1994, p. 164

This mission had the specific aim of establishing a safe place for Hannibal to debouch from the Alps into the Po valley. Hannibal did not know a great deal about the Alps, but he knew enough to know that it was going to be a difficult march. He had some scouts give him reports concerning this mountain chain, and he received reports of the difficulties to be encountered there from the Gauls themselves. He did not desire to cross this rugged mountain chain and to descend into the Po valley with exhausted troops only to have to fight a battle.

Hannibal knew enough about the Alps to know in particular that the descent was steeper than the ascent into the Alps. This was one of the reasons he wanted to have allies into whose territory he could march.The Alps rose as a result of the pressure of the African plate as it moved north against the stable Eurasian landmass; the northward direction of this movement made the Italian side of the Alps considerably steeper.

The Romans had poorly treated those Gauls whom they had recently conquered, distributing their land to Roman colonists and taking other unscrupulous measures to ensure their own security, against the freshly-conquered tribes. The Insubres, whose tribal territory immediately abutted the Alps, and the Boii, farther down the Po, were particularly pleased with Hannibal's proposed invasion. In addition, much of the Iberian peninsula was populated by related Gallic tribes,Dodge 1994, p. 165 and those same Gauls were serving in Hannibal's army. It would be easy indeed to establish intimate relations with these disaffected tribes, especially once he had debouched from the Alps and was amongst them and the Insubres and Boii and other tribes could see and speak with this army for themselves. Polybius had this to say about Hannibal's plans:

Conducted his enterprise with consummate judgement; for he had accurately ascertained the excellent nature of the country in which he was to arrive, and the hostile disposition of its inhabitants towards the Romans; and he had for guides and conductors through the difficult passes which lay in the way of natives of the country, men who were to partake of the same hopes with himselfDodge 1994, p. 166–167

Siege of Saguntum

These preparations being completed, Hannibal sought to induce the Saguntines to come to arms with him and thereby declare war on Rome through her proxy. He did not desire to break the peace himself,Mommsen 1862, p. 96Walbank 1979, p. 191 and resorted to a variety of stratagems in order to induce the Saguntines to attack. However, the Saguntines did nothing except send a diplomatic mission to the Romans to complain about the belligerence of the Carthaginians.Walbank 1979, p. 192 The Senate, in its turn, sent a committee to Iberia to attempt to settle the issue diplomatically. Hannibal openly scorned the Roman offer in the hopes that it would drive the commission to declare war. However, the commission was not fooled and knew that war was in the air. The commission kept its peace, but brought news to Rome that Hannibal was prepared and was going to strike soon. The Senate took a number of measures in order to free up its hands for the coming conflict with the Carthaginian. An Illyrian revolt was put down with energy, and the Romans sped up the construction of a number of fortresses in Cisalpine Gaul. Demetrius of Pharos had abandoned his previous alliance with Rome and was now attacking Illyrian cities that had been incorporated into the Roman State.Walbank 1979, p. 193

Hannibal could not achieve the ends that he had hoped for, and in the end he sent news to Carthage (where the peace party, his political enemies, were in power)Mommsen 1862, p. 91 to the effect that the Saguntines were aggressively handling one of their subject tribes, the Torboletes, and encamped in front of Saguntum to besiege it without awaiting any reply from Carthage. Words were exchanged in the Carthaginian Senate to the effect that Hannibal should be handed over to the Romans and his actions disavowed. However, the multitude in Carthage was too much in support of the conflict to order a stop to the war.

The siege took place over the course of eight months, and it is notable that the Romans did not send any aid to the Saguntines in spite of this being a part of the terms of their alliance. The Romans allowed themselves to be tied up in a war against the Illyrians, and did not treat the Carthaginian threat from Iberia with the attention that it deserved.

After the siege, Hannibal sold all the inhabitants as slaves, and distributed the proceeds from those sales to his soldiers. In addition, all the booty from the sacking of the city was taken back to Carthage and distributed to the populace, in order to rally their support to his cause. The rest of the city's treasures were put into his war chest for his planned expedition.Walbank 1979, p. 194

March through the Pyrenees

Hannibal had spent the winter after the siege of Saguntum in Cartagena, during which time he dismissed his troops to their own localities. He did this with the hope of cultivating the best possible morale in his army for the upcoming campaign, which he knew was going to be difficult. He left his brother, Hasdrubal in charge of the administration of Carthaginian Iberia, as well as its defence against the Romans. In addition to this, he swapped the native troops of Iberia to Africa, and the native troops of Africa to Iberia.Walbank 1979, p. 209 This was done in order to minimize desertion and assure the loyalty of the troops while he was himself busy with the destruction of Rome. He also left his brother a number of ships.Walbank 1979, p. 210

Hannibal foresaw problems if he left Catalonia as a bridgehead for the Romans. They had a number of allies in this country, and he could not allow the Romans a place to land in his base unopposed. As he was relying upon contingents of forces coming to him in Italy via the land route on which he was about to head out, he must take and conquer this country. He had no intention of leaving Iberia to its fate once he was in Italy. Hannibal opted to take the region in a swift campaign, and to that effect he divided his army into three columns, in order to subdue the entirety of the region at the same time.

After receiving route information from his scouts and messages from the Celtic tribes that resided around the Alps, Hannibal set out with 90,000 heavy infantry from various African and Iberian nations, and 12,000 cavalry. From the Ebro to the Pyrenees, the Carthaginians confronted four tribes: the Illergetes, the Bargusii, the Aeronosii, and the Andosini. There were a number of cities here that Hannibal took, which Polybius does not specify. This campaign was conducted with speed in order to take as little time as possible in the reduction of this region. Polybius reports severe losses on Hannibal's part. Having reduced this area, he left his general Hanno in command of this area, specifically over the Bargusii, whom he had reason to distrust due to their affiliation with the Romans. He left his brother in control of this country with 10,000 infantry and 1,000 cavalry.Walbank 1979, p. 211

At this early juncture in the campaign, he opted to send home another 10,000 infantry and 1,000 cavalry. This was done to serve two purposes: he wanted to leave a force of men behind who would retain positive sentiments towards Hannibal himself; and he wanted the rest of the Iberians (in his army, as well as out) to believe that the chances of success in the expedition were good, and as a result of which they would be more inclined to join the contingents of reinforcements that he anticipated calling up during the course of his expedition. The remaining force consisted of 50,000 infantry and 9,000 cavalry.Walbank 1979, p. 212

The principal column was the right column, and with it was the treasure chest, the cavalry, the baggage, all the other necessities of war, and Hannibal himself.Dodge 1994, p. 173 This was the critical column, and it was no coincidence that Hannibal was with it. As long as Hannibal had no ships to keep himself abreast of the exact movements of the Romans, he wanted to be present in person in case the Romans should make a landing in an attempt to attack his army on its ascent or descent through the Pyrenees. This column crossed the Ebro at the town of Edeba,Dodge 1994, p. 172 and proceeded directly along the coast through Tarraco, Barcino, Gerunda, Emporiae and Illiberis. Each of those oppidums was taken and garrisoned in turn.

The second, or central, column crossed the Ebro at the oppidum of Mora and from there information is fairly sparse. It proceeded through a number of valleys in this country, and had orders to subdue any tribes that resisted its advance. It eventually rejoined the principal column when it had completed its task.

The third, or left, column crossed the Ebro where it touches with the Sicoris River and proceeded along the river valley and into the mountain countries. It performed the same task as the second and the first columns did. When planning each of these marches, Hannibal ensured that the Rubrucatus river was athwart each of the columns' paths, so if any of the columns should be placed in a disadvantageous situation the other columns could march up and down the river in support of each other should one be placed in a perilous position by the Barbarians.

The campaign was conducted over the course of two months, and was incredibly costly. Over the course of the two-month campaign, Hannibal lost 13,000 men.

March to the Rhône

The march to the Rhône after the descent through the Pyrenees was mostly uneventful for the Carthaginians, who had just spent the previous July and August subduing numerous fierce peoples living in the Pyrenees.Dodge 1994, p. 171 The countries through which they passed were of different opinions concerning the Carthaginians, the Romans, and the passage of Hannibal's army through their land. Some of these tribes were friendly to Hannibal's cause, while others were opposed to him.Dodge 1994, p. 176 That no reports exist of any fighting taking place in this country, in spite of the lack of homogeneity in political leadership amongst the peoples of this area, reflects Hannibal's skill at negotiation. He dealt with each tribe as he marched through their territory, employing his charisma and considerable war chest.

Massalia (modern Marseille), a successful Greek trade emporium, had for some time been under the influence of the Romans, and the Romans had even settled colonists there. Massalia feared the arriving Carthaginian army, and to this effect had sought to influence the native tribes on the left bank of the Rhône (The Eastern Bank) to take up the cause of the Romans.Dodge 1994, p. 177 This they were able to do, as the barbarians in this country were to make his crossing of the Rhône problematic.

Publius Scipio, one of the consuls for 218 BC, received orders from the Senate to confront Hannibal in the theatre of the Ebro or the Pyrenees.Walbank 1979, p. 213 The Senate delegated to him 60 ships for this purpose.Walbank 1979, p. 214 However, he did not move with the speed that the issue required of him. When he arrived in the Po area, there was an uprising amongst the freshly conquered Gauls.Mommsen 1862, p. 102 More colonies were being established in the Po region, and this caused the Boii and Insubres to arise afresh who were now aware that Hannibal was heading to them. Instead of employing the legions that were on hand for their intended Iberian expedition, the Senate ordered that they should be sent to the Po under the command of a Praetor and new legions should be levied by the consul. The formation of a new army was a fairly easy matter for the Romans. There were so many citizens who were qualified for service in the army that all the government had to do was inform the citizenry that more soldiers were needed and they would be required to serve. Many Romans, being required to serve at some point, spent portions of their youth training to serve in the legions.

Finally, having got these new legions together – in a much more leisurely fashion than the urgency of the situation demanded of him – he set sail from Ostia. In this day there were no compasses, and it was the habit of navigators to sail their ships along the coast and to stop at night for victuals.Dodge 1994, p. 127 So, after sailing north along the peninsula's coast (Italian) and then turning west towards the Iberian peninsula, the consul ordered the fleet to stop in Massalia.Dodge 1994, p. 178 The time from Ostia to Massalia was 5 days. When he arrived there, to his surprise he learned from the Massaliots that instead of Hannibal still being in Catalonia, as he had anticipated, Hannibal was about 4 days marchWalbank 1979, p. 215 north of their city on the far side of the Rhône.

Crossing the Rhône

Much of Hannibal's marches are shrouded in debate, especially the path he opted to employ over the Alps. However, modern historians agree on where Hannibal encamped his army on the western bank of the Rhône and see the river crossing as clearly conceived and crisply executed.

While Rome had been idle and leaving her allies in Catalonia to their fate at the hands of the Carthaginians, the Massaliots, allies of the Romans, were busy rousing the tribes on the eastern bank of the Rhône against the Carthaginians. Upon the arrival of intelligence indicating the presence of the Carthaginians in the neighbourhood of Massalia, the consul gave up his proposed Iberian expedition and instead redirected his efforts to prevent Hannibal's crossing of the Rhône. To this effect he sent a column of 300 horses up the left (east) bank of the Rhône with orders to ascertain the exact location of Hannibal's army. Hannibal received similar news to the effect that the Romans had just arrived with one of their consular armies (22,000 feet and 2,000 horses).Mommsen 1862, p. 103

Hannibal took advantage of the pre-existing hatred the Celts on the western bank had for the Romans, and persuaded them to aid him in his crossing of this formidable obstacle. He secured from them a number of boats that were capable of making trips at sea, and a numerous collection of canoes of all sorts that must have been employed by the natives of that country. In addition to purchasing these, he was able to acquire their aid in building still other boats.Dodge 1994, p. 179 This process of preparing to cross the Rhone took two days.

Awaiting the Carthaginian army on the eastern bank of the Rhône was a tribe of Gauls called the Cavares. This tribe had fortified a camp on the far side of the river,Dodge 1994, p. 180 and was awaiting Hannibal's army to cross, so as to attack them as they crossed. There can be no doubt that Hannibal knew of Alexander the Great's crossing of the Hydaspes river in India as, from a tactical and strategic standpoint, he employed almost the same strategy. Hannibal formulated his plan according to this model (it is still held up as the standard way to cross rivers, even to modern cadets at military institutions) and ordered one of his lieutenants, Hanno, son of Bomilcar, to make a northern circuit to cross the Rhône at a location that he deemed to be suitable for the purpose. The lieutenant was then ordered to march south and to take the Barbarian army in flank while he was crossing the river.

The day and the night after all of the boats had been built and gathered, Hanno was ordered up the bank and guided by native Gauls, approximately upriver at Pont St. Esprit there was an island that divided the Rhône into two small streams. It was here that Hanno decided to cross, and ordered that boats and rafts should be constructed from materials that were at hand.Walbank 1979, p. 216Dodge 1994, p. 181 The Carthaginian detachment chopped down trees, lashing the logs together with reliable ropes they had brought with them from the army's stores. By this means, Hanno's corps crossed the river and immediately proceeded south to the barbarian location.

During this time, Hannibal had been completing his preparations to cross the Rhône. At this, the Carthaginian preparations had been particularly obvious and loud – Hannibal had ordered the preparations to be made without concern for secrecy, knowing full well that Hanno's corps was marching down the eastern bank of the Rhône to attack the Cavares. His preparations were designed to draw their attention away from their northern flank and focus their attention on his own preparations. Three days after setting out, Hanno arrived behind a tributary of the Rhone and gave the previously agreed upon signal to let Hannibal know that his force had arrived. Hannibal immediately ordered the boats to cross. The small corps was observing the principal army closely, and on seeing it start its crossing, prepared to descend on the Cavares while the army was crossing.

The crossing itself was carefully designed to be as smooth as possible. Every detail was well thought out. The heavy horsemen were put across furthest upstream, and in the largest boats, so that the boats that Hannibal had less confidence in could be rowed to the western bank in the lee of the larger and more sturdy craft. As for the horses themselves, most of them were swum across the river at the side and stern of each boat. However, some were put on boats fully saddled and ready for immediate use, so that, once they debouched from the river, they could cover the infantry and the rest of the army while it formed up to attack the barbarians.

Seeing that the Carthaginians were finally crossing, the Cavares rose from their entrenchments and prepared their army on the shore near the Carthaginian landing point.Dodge 1994, p. 184 The troops started to shout and jeer at each other while the Carthaginian army was in the midst of crossing.Dodge 1994, p. 182 These sorts of exchanges consisted primarily of encouraging their own men and challenging the other army to battle. Often in antiquity, to intimidate their enemy, troops would be ordered to pound their shields with their weapons and raise loud cries at precisely the same moment to create the greatest amount of noise.

It was at precisely this moment, while the Carthaginian army was in the middle of the stream jeering at the enemy from the boats and the Cavares were challenging them to come on from the western bank, that Hanno's corps revealed themselves and charged down on the rear and flanks of the Cavares.Walbank 1979, p. 217 A small detachment of Hanno's force was assigned to set the Cavares camp on fire, but the majority of this force reeled in on the stunned Cavares. Some of the Cavares rushed to the defence of their camp,Mommsen 1862, p. 104 but the majority remained at the location where they had been awaiting the arrival of what they had thought was all of Hannibal's army. They were divided; and Hannibal, who was on one of the first boats, landed his men on the western bank of the Rhône amidst the dazed and confused Cavares and with a will led his men in upon them. There was barely even a semblance of resistance; surrounded as they were, pandemonium took control of their ranks, and each man looked to his own safety as they retreated pell-mell away from the carefully arrayed Carthaginian phalanx.

While the actual conflict only took a matter of minutes, Hannibal had spent five days preparing this dangerous and risky operation from every angle, ensuring that it was ready at all points and as little as possible was left to chance.

From the Rhône to the Alps

Hannibal needed to reach the Alps quickly in order to beat the onset of winter. He knew that if he waited until springtime on the far side of the mountains, the Romans would have time to raise another army. He had intelligence that the consular army was camped at the mouth of the Rhône. He sent 500 Numidian cavalry down the eastern bank of the river to acquire better information concerning the forces massed to oppose him. This force encountered 300 mounted Romans who had been sent up the river for the same purpose. The Numidians were defeated with 240 of their number killed in this exchange between scouting parties; in addition to 140 Roman losses. The Numidians were followed back to the Carthaginian camp, which was almost assembled excepting the elephants, which required more time getting across. Upon seeing Hannibal had not crossed with the whole of his force, the scouts raced back to the coast to alert the consul. Upon receiving this information, the consul dispatched his army up the river in boats, but arrived too late.

In the face of winter and hostile tribes, the consul decided to return to Italy and await the arrival of Hannibal as he descended from the Alps. However, in accordance with the Senate's orders, the consul ordered his brother, Gnaeus Scipio to take a majority of the army to Spain. The consul proposed attacking Hannibal's overextended and vulnerable lines of communications and supply. Despite their established tactical system (formations and troop evolutions, etc.), the Romans were used to fighting by marching their troops to their enemies' army, forming their army up and attacking. They did not know how to force an enemy to battle by cutting off their communications, they were not aware of which flank was the strategic flank of an enemy in a battle. In addition, they were negligent about their order of march,Dodge 1994, p. 63 and early Roman history is littered with massacres of consular armies by other nations because of their lack of proper precaution against these evils.Dodge 1994, p. 64

On getting the whole of his army on the left bank of the Rhone, Hannibal introduced his army to Magilus, and some other less notable Gallic chiefs of the Po valley.Mommsen 1862, p. 105 Hannibal's purpose was to inspire his men with confidence in the planned expedition by showing them Padane Gallic chieftains who offered them their aid. Speaking through an interpreter, Magilus spoke of the support that the recently conquered Padane Gauls had for the Carthaginians and their mission of destroying Rome. Hannibal then addressed the officers himself. The troops' enthusiasm was uplifted by Hannibal's inspiring address.

Upon crossing the river, Hannibal ordered his infantry to start their march the day after the assembly, followed by the supply train.Dodge 1994, p. 187 Not knowing that the Romans were eventually going to set out for Italy, when his cavalry had crossed the river he ordered them to curtain his march on his southern flank, towards the sea. His cavalry would have formed a screen which would have been employed to protect him from the Romans were they to advance upon him from that direction. The cavalry would skirmish with the Roman scouts, while giving the rest of the army time to form up. This contingency did not occur. Hannibal was in the rearguard with the elephants. This was the direction that he assumed that the Romans would be most likely to advance from (that is from the west) as he had some idea that they were behind him. The rearguard was well manned to ensure that it could skirmish with the Roman army while the main body of his infantry and cavalry could form up for battle against the Romans if they should attack from that quarter. This contingency, however, also did not occur.

While assuming this order of march, Hannibal marched towards the Insula. He had ordered his infantry to get a head start, and it marched to the Isère

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