- Battle of Alesia
Infobox Military Conflict
conflict=Battle of Alesia
caption=A reconstructed section of the Alesia investment fortifications
date=September 52 BC
place= Alise-Sainte-Reine (
result=Decisive Roman victory, the final conquest of
12 Roman legions and auxiliaries
some 80,000 besieged
80,000–250,000 relief forces
casualties2=40,000–250,000Fact|date=February 2007The Battle of Alesia or Siege of Alesia took place in September, 52 BC around the
Gallic" oppidum" of Alesia, a major town centre and hill fortof the Mandubiitribe. It was fought by the army of the Roman Republiccommanded by Julius Caesar, aided by cavalry commanders Mark Antony, Titus Labienusand Gaius Trebonius, against a confederation of Gallic tribes united under the leadership of Vercingetorixof the Averni, and was the last major engagement between Gaulsand Romans, marking the turning point of the Gallic Warsin favour of Rome. The siege of Alesia is considered one of Caesar's greatest military achievements, and is still one of the classic examples of siege warfareand circumvallation.
It was situated probably atop Mont Auxois, above modern
Alise-Sainte-Reinein France, but this location—some have argued— does not fit Caesar's description of the battle . A number of alternatives have been proposed over time, among which only Chaux-des-Crotenay(in Jura in modern France) remains a challenger today.
At one point in the battle the Romans were outnumbered by the Gauls by five to one. The event is described by several contemporary authors, including Caesar himself in his "
Commentarii de Bello Gallico". After the Roman victory, Gaul(very roughly modern France) was subdued and became a Roman province. The refusal of the Roman senateto allow Caesar the honour of a triumph for his victory in the Gallic Wars eventually led, in part, to the Roman Civil War of 50–45 BC.
Julius Caesar had been in Gaul since 58 BC. It was customary for
consuls, Rome's highest elected officials, at the end of their consular year, to be appointed proconsuland assume governorship of one of Rome's provinces by the Roman Senate, and following his first consulship in 59 BC, Caesar engineered his own appointment of Cisalpine Gaul(the region between the Alps, the Apennines and the Adriatic), and Transalpine Gaul("Gaul beyond the Alps"). Although the proconsular term of office is normally one year, Caesar was able to secure his post in Gaul for an unprecedented ten years. With a proconsular " Imperium", he had absolute authority within these provinces.
One by one Caesar defeated Gallic tribes such as the
Helvetii, the Belgae, and the Nervii, and secured a pledge of alliance from many others. The ongoing success of the Gallic Wars brought an enormous amount of wealth to the Republic in spoils of war and in new lands to tax. Caesar himself became very rich since, as general, he benefited from the sale of war prisoners. But success and fame also brought enemies. The First Triumvirate, a political (although informal) alliance with Pompeyand Crassus, came to an end in 54 BC, with the deaths of Julia (Caesar's daughter and Pompey's wife) and Crassus in the battle of Carrhae. Without this political connection with Pompey, men dedicated to the Republic like Cato the Youngerstarted a political campaign against Caesar, arousing suspicion and accusing him of wanting to overthrow the Republic and become King of Rome.
In the winter of 54–53 BC, the previously pacified
Eburones, commanded by Ambiorix, rebelled against the Roman invasion and destroyed the Fourteenth legion under the command of Quintus Titurius Sabinusin a carefully planned ambush. This was a major blow to Caesar's strategy for Gaul, since he had now lost about a quarter of his troops, and the evolution of the political situation in Rome deprived him from receiving reinforcements. The Eburones rebellion was the first clear Roman defeat in Gaul and inspired widespread national sentiments and revolution. It took almost a year, but Caesar managed to regain control of Gaul and pacify the tribes. However, the unrest in Gaul was not over. The Gallic tribes were now realising that only united could they achieve independence from Rome. A general council was summoned at Bibracteby initiative of the Aedui, once Caesar's loyal supporters. Only the Remiand the Lingonespreferred to keep their alliance with Rome. The council declared Vercingetorix, of the Averni, commander of the united Gallic armies.
Caesar was then camped for the winter in
Cisalpine Gaul, unaware of the alliance made against him. The first sign of trouble came from the Carnuteswho killed all Roman settlers in the city of Cenabum (modern Orléans). This outbreak of violence was followed by the slaughtering of all Roman citizens, merchants and settlers in the major Gallic cities. On hearing this news, Caesar rallied his men in haste and crossed the Alps, still buried in snow, into central Gaul. This was accomplished in record time and Caesar was able to surprise the Gallic tribes. He split his forces, sending four legions with Titus Labienusto fight the Senonesand the Parisiiin the North. Caesar himself set on the pursuit of Vercingetorix with six legions and his allied Germanic cavalry. The two armies met at the hill fort of Gergovia, where Vercingetorix held a strongly defensive position. Caesar was forced to retreat to avoid utter defeat, after suffering heavy losses. In the summer of 52 BC, several engagements were fought between cavalries, with Caesar succeeding in scattering the Gallic army. Vercingetorix decided that the timing was not right to engage in a major pitched battle and regrouped in the Mandubiifort of Alesia.
iege and battle
Alesia was a hill-top fort surrounded by river valleys, with strong defensive features. As a frontal assault would have been suicidal, Caesar decided upon a
siege, hoping to force surrender by starvation. Considering that about 80,000 men were garrisoned in Alesia, together with the local civilian population, this would not take long. To guarantee a perfect blockade, Caesar ordered the construction of an encircling set of fortifications, called a circumvallation, around Alesia. The details of this engineering work are known from Caesar's "Commentaries" and archaeological excavations on the site.Fact|date=March 2008 About 18 kilometres of 4 metre high fortifications were constructed in a record time of about three weeks. This line was followed inwards by two four-and-a-half metre wide ditches, about one and a half metres deep. The one nearest to the fortification was filled with water from the surrounding rivers. This was a considerable engineering feat, but nothing new to the man who, as curule aedile, an elected official of the city of Rome, had once diverted the Tiberinto the Circus Maximusfor a mock sea battle, as a form of public entertainment.Fact|date=November 2007 These fortifications were supplemented with mantraps and deep holes in front of the ditches, and regularly spaced watch towers equipped with Roman artillery.
Vercingetorix's cavalry often raided the construction works attempting to prevent full enclosure. The Germanic auxiliary cavalry proved its value and kept the raiders at bay. After about two weeks of work, a detachment of Gallic cavalry managed to escape through an unfinished section. Anticipating that a relief force would now be sent, Caesar ordered the construction of a second line of fortifications, the
contravallation, facing outward and encircling his army between it and the first set of walls. The second line was identical to the first in design and extended for 21 kilometres, including four cavalry camps. This set of fortifications would protect the Roman army when the relief Gallic forces arrived: they were now besiegers and preparing to be besieged.
At this time, the living conditions in Alesia were becoming increasingly worse. With 80,000 soldiers and the local population, too many people were crowded inside the plateau competing for too little food. The Mandubii decided to expel the women and children from the citadel, hoping to save food for the fighters and hoping that Caesar would open a breach to let them go. This would also be an opportunity for breaching the Roman lines. But Caesar issued orders that nothing should be done for these civilians and the women and children were left to starve in the no man's land between the city walls and the circumvallation. The cruel fate of their kin added to the general loss of morale inside the walls. Vercingetorix was fighting to keep spirits high, but faced the threat of surrender by some of his men. However, the relief force arrived in this desperate hour, strengthening the resolve of the besieged to resist and fight another day.
At the end of September the Gauls, commanded by
Commius, attacked Caesar's contravallation wall. Vercingetorix ordered a simultaneous attack from the inside. None of the attempts were successful and by sunset the fighting had ended. On the next day, the Gallic attack was under the cover of night. This time they met more success and Caesar was forced to abandon some sections of his fortification lines. Only the swift response of the cavalry commanded by Antony and Gaius Treboniussaved the situation. The inner wall was also attacked, but the presence of trenches, which Vercingetorix's men had to fill, delayed them enough to prevent surprise. By this time, the condition of the Roman army was also poor. Themselves besieged, food had started to be rationed and men were near physical exhaustion.
On the next day,
October 2, Vercassivellaunus, a cousin of Vercingetorix, launched a massive attack with 60,000 men, focusing on a weakness in the Roman fortifications (the open circle in the figure) which Caesar had tried to hide, but had been discovered by the Gauls. The area in question was a zone with natural obstructions where a continuous wall could not be constructed. The attack was made in combination with Vercingetorix's forces who pressed from every angle of the inner fortification. Caesar trusted the discipline and courage of his men and sent out orders to simply hold the lines. He personally rode throughout the perimeter cheering his legionaries. Labienus' cavalry was sent to support the defense of the area where the fortification breach was located. With pressure increasing, Caesar was forced to counter-attack the inner offensive and managed to push back Vercingetorix's men. By this time the section held by Labienus was on the verge of collapse. Caesar decided on a desperate measure and took 13 cavalry cohorts (about 6,000 men) to attack the relief army of 60,000 from the rear. This action surprised both attackers and defenders. Seeing their leader undergoing such risk, Labienus' men redoubled their efforts and the Gauls soon panicked and tried to retreat. As in other examples of ancient warfare, the disarrayed retreating army was easy prey for the disciplined Roman pursuit. The retreating Gauls were slaughtered, and Caesar in his "Commentaries" remarks that only the pure exhaustion of his men saved the Gauls from complete annihilation.
In Alesia, Vercingetorix witnessed the defeat of his relief force. Facing both starvation and low morale, he was forced to surrender without a final fight. On the next day, the Gallic leader presented his arms to Julius Caesar, putting an end to the siege of Alesia.
Alesia proved to be the end of generalized and organized resistance to the Roman invasion of Gaul. The country was then subdued, becoming a
Roman provinceand was eventually subdivided into several smaller administrative divisions. Not until the third centurywould another independence movement occur (see Gallic Empire). The garrison of Alesia was taken prisoner as well as the survivors of the relief army. They were either sold into slavery or given as booty to Caesar's legionaries, except for the members of the Aedui and Averni tribes, which were released and pardoned to secure the alliance of these important tribes to Rome.
For Caesar, Alesia was an enormous personal success, both militarily and politically. The senate, manipulated by Cato and Pompey, declared 20 days of thanksgiving for this victory, but refused Caesar the honour of celebrating a triumphal parade, the peak of any general's career. Political tension increased, and two years later, in 50 BC, Caesar crossed the
Rubicon, which precipitated the Roman civil war of 49–45 BC, which he won. After having been elected consul, for each of the years of the war, and appointed to several temporary dictatorships, he was finally made "dictator perpetuus" (dictator for life), by the Roman Senate in 44 BC. His ever increasing personal power and honours undermined the tradition bound republican foundations of Rome, and led to the end of the Roman Republic and the beginning of the Roman Empire.
Caesar's cavalry commanders followed different paths. Labienus sided with the
Optimates, the conservative aristocratic faction in the civil war, and was killed at the Battle of Mundain 45 BC. Trebonius, one of Caesar's most trusted lieutenants, was appointed consul, by Caesar, in 45 BC, and was one of the senators involved in Caesar's assassination on the Ides of March( March 15) 44 BC. He was himself murdered a year later. Antony continued to be a faithful supporter of Caesar. He was made Caesar's second in command, as Master of the Horse, and was left in charge in Italy during much of the civil war. In 44 BC he was elected as Caesar's consular colleague. After Caesar's murder, Antony pursued Caesar's assassins and vied for supreme power with Octavian (later to become Caesar Augustus), first forming an alliance with Octavian (and Marcus Aemilius Lepidus) in the Second Triumvirate, then being defeated by him at the Battle of Actiumin 31 BC. Along with his ally and lover queen Cleopatra, he fled to Egypt, where they committed suicide, the following year. Vercingetorixwas taken prisoner and languished in prison for the next five years while awaiting to be exhibited at Caesar's triumph. As was traditional for such captured and paraded enemy leaders, at the end of the triumphal procession, he was taken to the Tullianum (also known as the Mamertine Prison) where he was strangled.
Issues in historical reconstruction of the events
For many years, the actual location of the battle was unknown. Competing theories focused first on two towns, Alaise in the
Franche-Comtéand Alise-Sainte-Reine in the Côte-d'Or. Emperor Napoleon III of Francesupported the latter candidate and during the 1860s funded archaeological research that uncovered the evidence to support the existence of Roman camps in the area. He then dedicated a statue to Vercingetorix in the recently discovered ruins.
Uncertainty has nevertheless persisted, with questions being raised about the validity of Alise-Sainte-Reine's claim. For example, the topography of the area—it is allegedly said—does not fit with Caesar's description. The site is also too small to accommodate even revised estimates of 80,000 men with the Gallic infantry, along with cavalry and additional personnel.
Another theory supports the location of the battle at
Chaux-des-Crotenayat the gate of the Jura mountains. Preliminary researches in Chaux-de-Crotenay unveiled a complete system of Roman fortifications in good fit with Caesar's description of the site. However, further archaeological research is needed to definitively confirm the location of Alesia.
Asterixcomics (" Asterix and the Chieftain's Shield"), this uncertainty about Alesia's location is humorously characterized as a reflection of Gallic pride. The album portrays Asterix and Obelix encountering other Gauls familiar with the campaign, who readily recall Vercingetorix's victory at the Battle of Gergovia, but refuse to talk about Alesia and insist that nobody knows where it is.
Precise figures for the size of the armies involved, and the number of casualties suffered, are difficult to know. Such figures have always been a powerful
propagandaweapon, and are thus suspect. Caesar, in his "De Bello Gallico", refers to a Gallic relief force of a quarter of a million, probably an exaggeration to enhance his victory. Unfortunately, the only records of the events are Roman and therefore presumably biased. Modern historians usually believe that a number between 80,000–100,000 men is more credible. The only known fact is that each man in Caesar's legions received a Gaul as a slave, which means at least 40,000 prisoners, mostly from the besieged garrison. The relief force probably suffered heavy losses, like many other armies who lost battle order and retreated under the weapons of the Roman cavalry.
J.F.C. Fuller, "Julius Caesar: Man, Soldier, and Tyrant", Da Capo Press, 1991, ISBN 0-306-80422-0
Julius Caesar(ca. 45 BC), "Commentaries on the Gallic Wars", Harvard University Press. ISBN 0-674-99080-3
**Available online, eg: [http://classics.mit.edu/Caesar/gallic.html English translation by W. A. McDevitte and W. S. Bohn (1869)]
Adrian Goldsworthy(2002) "Roman Warfare". Cassell. ISBN 0-304-36265-4
* [http://www.unrv.com/fall-republic/siege-of-alesia.php Account of the battle and surrounding events] (retrieved late November 2005)
* [http://www.livius.org/caa-can/caesar/caesar_t16.html Livius.org account of the battle] (retrieved late November 2005)
* [http://www.zdf.de/ZDFmt/mediathek/ZDFmt_video_cont/0,3498,MT-2213499--MD-1000051-hi--1,00.html Video: Exact location of Alesia at Alise-Sainte-Reine (german)]
* [http://home.versatel.nl/postbus/images/alesia15.jpgPhoto: Gaulish inscription, which shows the Gaulish spelling of Alésia: "ALISIIA", found at the "Forum" in Alise-Sainte-Reine, 1st century B.C.E., 50 X 34 cm]
* [http://members.aol.com/skyelander/vercin2.html Vercingetorix: Gallic Warrior, Pt. 2 Battle of Alesia]
* [http://www.angelfire.com/me/ik/alesia2.html Alésia - the battle against the Romans]
* [http://www.livius.org/aj-al/alesia/alesia.html Julius Caesar: The siege of Alesia]
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