The Battle of the Arar was fought between the migrating tribes of the Helvetii and six Roman legions under the command of Gaius Julius Caesar in 58 BC. It was the first major battle of the Gallic Wars and ended in a tactical victory for the outnumbered Roman army.
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Battle of the Arar | |||||||
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Part of the Gallic Wars | |||||||
Campaign of Caesar against the Helvetii | |||||||
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Belligerents | |||||||
Roman Republic | Helvetii | ||||||
Commanders and leaders | |||||||
Julius Caesar | Dumnorix | ||||||
Units involved | |||||||
Legio VII Legio VIII Legio IX Legio X Legio XI Legio XII | Unknown | ||||||
Strength | |||||||
6 Legions | 92,000 [1] |
When Caesar became governor of the provinces given to him by the Roman Senate, three of his four legions were in northeastern Italy guarding against potential threats from Thracian tribes. The Transalpine Gaul Province, however, was guarded by a single legion and exposed to invasions by the enemies of Rome. [2]
Shortly after he became governor, Caesar became aware that the Helvetii were planning to migrate to western Gaul as a result of the growing presence of Germanic tribes in their present home territory. The migration of the Helvetii into Roman Gaul and the potential creation of a new Helvetian state was seen by Rome as a threat to the stability of Gaul, Transalpine Gaul, and Roman Hispania. [2]
When the Helvetii asked the Romans for permission to cross through the Province on their way to Gaul, Caesar stalled for time pretending to consider the request. Never intending to allow the Helvetii to pass, Caesar used the time bought by stalling to block the Helvetii's path by destroying the bridge across the river Rhone at Geneva and constructing 30 kilometers of fortifications. In addition, Caesar increased the size of his army by raising two new legions in Transalpine Gaul and procuring three veteran legions from Rome. [2]
Ultimately, Caesar denied the Helvetii's request to pass through the Province. This caused the Helvetii to take an alternative route through the territory of the Aedui tribe and cross the river Arar (Saône) using rafts and boats. [2]
When Caesar was informed that the Helvetii were taking a different route, he sent his forces to attack the Helvetii as they traveled west toward Gaul. When the Romans caught up to the Helvetii, they were in the midst of the river crossing. Three-quarters of the Helvetii had already crossed the river leaving only a quarter of the Helvetii travelers east of the river open to attack. As a result, Caesar was able to attack only a portion of the Helvetii, easily killing many and scattering many others into the countryside. [2]
After the battle, the Helvetii failed to negotiate a peaceable agreement permitting their travel and resumed their migration west to Gaul. As a result, Caesar quickly bridged the river Arar and pursued the Helvetii for over two weeks until he was forced to divert his army to the city of Bibracte to replenish provisions. As Caesar's army traveled to Bibracte, the Helvetii tried to take advantage of the situation and attack Caesar's legions while they were in transit. In their effort to destroy the Roman legions, the Helvetii were unsuccessful in the battle that took place and suffered a major defeat. [2]
The Helvetii that Caesar defeated were part of the pagus (sub-tribe) of the Tigurini which in 107 BC had slain the Consul Lucius Cassius Longinus, as well as the legate Lucius Calpurnius Piso, the grandfather of the Lucius Calpurnius Piso who was the father-in-law of Caesar.
The Aedui or Haedui were a Gallic tribe dwelling in what is now the region of Burgundy during the Iron Age and the Roman period.
This article concerns the period 59 BC – 50 BC.
Commentarii de Bello Gallico, also Bellum Gallicum, is Julius Caesar's firsthand account of the Gallic Wars, written as a third-person narrative. In it Caesar describes the battles and intrigues that took place in the nine years he spent fighting the Celtic and Germanic peoples in Gaul that opposed Roman conquest.
Year 58 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Piso and Gabinius. The denomination 58 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
The Gallic Wars were waged between 58 and 50 BC by the Roman general Julius Caesar against the peoples of Gaul. Gallic, Germanic, and Brittonic tribes fought to defend their homelands against an aggressive Roman campaign. The Wars culminated in the decisive Battle of Alesia in 52 BC, in which a complete Roman victory resulted in the expansion of the Roman Republic over the whole of Gaul. Though the collective Gallic armies were as strong as the Roman forces, the Gallic tribes' internal divisions eased victory for Caesar. Gallic chieftain Vercingetorix's attempt to unite the Gauls under a single banner came too late. Caesar portrayed the invasion as being a preemptive and defensive action, but historians agree that he fought the wars primarily to boost his political career and to pay off his debts. Still, Gaul was of significant military importance to the Romans. Native tribes in the region, both Gallic and Germanic, had attacked Rome several times. Conquering Gaul allowed Rome to secure the natural border of the river Rhine.
Lucius Calpurnius Piso Caesoninus was a Roman senator and the father-in-law of Julius Caesar through his daughter Calpurnia. He was reportedly a follower of a school of Epicureanism that had been modified to befit politicians, as Epicureanism itself favoured withdrawal from politics. Piso was consul in the year 58 BC with Aulus Gabinius as his colleague.
Legio X Equestris, a Roman legion, was one of the most trusted legions of Julius Caesar. Legio X was famous in its day and throughout history, because of its portrayal in Caesar's Commentaries and the prominent role the Tenth played in his Gallic campaigns. Its soldiers were discharged in 45 BC. Its remnants were reconstituted, fought for Mark Antony and Octavian, disbanded, and later merged into X Gemina.
Aulus Hirtius was consul of the Roman Republic in 43 BC and a writer on military subjects. He was killed during his consulship in battle against Mark Antony at the Battle of Mutina.
The Battle of Alesia or siege of Alesia was the climactic military engagement of the Gallic Wars, fought around the Gallic oppidum of Alesia in modern France, a major centre of the Mandubii tribe. It was fought by the Roman army of Julius Caesar against a confederation of Gallic tribes united under the leadership of Vercingetorix of the Arverni. It was the last major engagement between Gauls and Romans, and is considered one of Caesar's greatest military achievements and a classic example of siege warfare and investment; the Roman army built dual lines of fortifications—an inner wall to keep the besieged Gauls in, and an outer wall to keep the Gallic relief force out. The Battle of Alesia marked the end of Gallic independence in the modern day territory of France and Belgium.
Ariovistus was a leader of the Suebi and other allied Germanic peoples in the second quarter of the 1st century BC. He and his followers took part in a war in Gaul, assisting the Arverni and Sequani in defeating their rivals, the Aedui. They then settled in large numbers into conquered Gallic territory, in the Alsace region. They were defeated, however, in the Battle of Vosges and driven back over the Rhine in 58 BC by Julius Caesar.
Dumnorix was a chieftain of the Aedui, a Celtic tribe in Gaul in the 1st century B.C. He was the younger brother of Divitiacus, the Aedui druid and statesman.
The Battle of Bibracte was fought between the Helvetii and six Roman legions, under the command of Gaius Julius Caesar. It was the second major battle of the Gallic Wars.
Lucius Calpurnius Piso Caesoninus was the son of Lucius Calpurnius Piso Caesoninus, consul in 148 BC.
Lucius Cassius Longinus was consul of the Roman Republic in 107 BC. His colleague was Gaius Marius, then serving the first of his seven consulships.
The Battle of Vosges also referred to as the Battle of Vesontio was fought on September 14, 58 BC between the Germanic tribe of the Suebi, under the leadership of Ariovistus, and six Roman legions under the command of Gaius Julius Caesar. This encounter is the third major battle of the Gallic Wars. Germanic tribes crossed the Rhine, seeking a home in Gaul.
The Battle of Lutetia was a battle on the plain of Grenelle in what is now Paris between Roman forces under Titus Labienus and an anti-Roman Gallic coalition in 52 BC during the Gallic Wars. It was a Roman victory.
Divico was a Celtic king and the leader of the Helvetian tribe of the Tigurini. During the Cimbrian War, in which the Cimbri and Teutons invaded the Roman Republic, he led the Tigurini across the Rhine to invade Gaul in 109 BC. He defeated a Roman army near present-day Agen on the Garonne river at the Battle of Burdigala in 107 BC, killing its leaders Lucius Cassius Longinus, the Roman consul, and Lucius Calpurnius Piso Caesoninus. Eventually he led his people back to the tribes of the Helvetii, near present-day Switzerland where they settled in the Jura Mountains near Lac Leman. 49 years later, before the Battle of Bibracte, he led a delegation back to Gaul to negotiate for a safe passage for his tribe through the Roman region of Provence. The request was denied by Caesar who wanted revenge for a relative who had been killed in the battle near Agen in 107 BC.
The Tulingi were a small tribe closely allied to the Celtic Helvetii in the time of Julius Caesar's conquest of Gaul. Their location is unknown; their language and descent are uncertain. From their close cooperation with the Helvetii it can be deduced that they were probably neighbours of the latter. At the Battle of Bibracte in 58 BCE, they were, with the Boii and a few other smaller tribes, allies of the Helvetii against the Roman legions of Caesar.
The military campaigns of Julius Caesar were a series of wars that reshaped the political landscape of the Roman Republic, expanded its territories, and ultimately paved the way for the transition from republic to empire. The wars constituted both the Gallic Wars and Caesar's civil war.
The Battle of Magetobriga was fought in 63 BC between rival tribes in Gaul. The Aedui tribe was defeated and massacred by the combined forces of their hereditary rivals, the Sequani and Arverni tribes. To secure their victory, the Sequani and Arverni enlisted the aid of the Germanic Suebi tribe led by its king Ariovistus, who would subsequently make increasingly imposing demands upon his Gallic allies. Following their defeat, the Aedui sent envoys to the Roman Senate, their traditional ally, seeking aid. The Roman general Julius Caesar would use the Aedui’s entrities and Ariovistus’ oppression as pretexts for launching his conquest of Gaul.