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The 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 fort of the Mandubii tribe. It was fought by an army of the Roman Republic commanded by Julius Caesar, aided by cavalry commanders Mark Antony, Titus Labienus and Gaius Trebonius, 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, marking the turning point of the Gallic Wars in favour of Rome. The Siege of Alesia is considered one of Caesar's greatest military achievements and a classic example of siege warfare and investment. The battle of Alesia can safely be described as marking the end of Celtic dominance in France, Belgium, Switzerland and Northern Italy. The battle site was probably atop Mont Auxois, above modern Alise-Sainte-Reine in 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.〔(【引用サイトリンク】title=Alésia Mandubiorum l'Hypothèse jurassienne )〕 At one point in the battle the Romans were outnumbered by the Gauls by four 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 Roman senate refused to allow Caesar the honour of a triumph for his victory in the Gallic War, although it did grant a general thanksgiving of 20 days. 〔Julius Caesar. Commentarii de Bello Gallico. Book VII, XC.〕 ==Prelude== Julius Caesar had been in Gaul since 58 BC. At the end of their consular year it was customary for consuls, Rome's highest elected officials, to be appointed proconsul by the Roman Senate and assume governorship of one of Rome's provinces. Following his first consulship in 59 BC, Caesar engineered his own appointment to Cisalpine Gaul (the region between the Alps, the Apennines and the Adriatic – modern-day Northern Italy), and Transalpine Gaul ("Gaul beyond the Alps" – modern-day Switzerland and Alpine France). 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 and had defeated, through an initially unsuccessful campaign, the Celtic tribes of Northern Italy (Insubres, Boii, Taurini, Venetii). One by one Caesar defeated Gallic (Continental Celts) 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 Pompey and Crassus, came to an end in 54 BC, with the deaths of Julia (Caesar's daughter and Pompey's wife) in childbirth and Crassus in the battle of Carrhae. Without this political connection with Pompey, men dedicated to the Republic like Cato the Younger started 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 occupation and destroyed the Fourteenth legion under the command of Quintus Titurius Sabinus in 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 political situation in Rome deprived him from receiving reinforcements. The Eburone 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 had realised that only united could they achieve independence from Rome. A general council was summoned at Bibracte through initiative of the Aedui, once Caesar's loyal supporters. Only the Remi and the Lingones preferred to keep their alliance with Rome. The council declared Vercingetorix, of the Arverni, 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 Carnutes who 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 army 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 Labienus to fight the Senones and the Parisii in the North while Caesar himself set out in 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 strong 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 Mandubii fort of Alesia. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Battle of Alesia」の詳細全文を読む スポンサード リンク
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