The Battle of the Allia was a battle of the first Gallic invasion of Italy.

Background

Prior to the battle, the Gauls invaded the Etruscan province of Siena and attacked the town of Clusium. The Clusians, overwhelmed by the size of the enemy in numbers and ferocity, called on Rome for help, though they were not allies or friends. Rome, weakened by recent wars, sent a delegation to investigate the situation. Negotiations broke down, resulting in Quintus Fabius, a member of a powerful patrician family, killing one of the Gallic leaders. The Gauls demanded the Fabians be handed over to them for justice. However, the defiant Romans not only refused, but, as Livy writes, "those who ought to have been punished were instead appointed for the coming year military tribunes with consular powers (the highest that could be granted)." The enraged Gauls promised war against the Romans to avenge the insult that they had been dealt, resulting in the Battle of the Allia and the subsequent siege of Rome itself.

Roman Disaster

The battle took place on July 18, 390 BC, between 40,000 Romans under Quintus Sulpicius, and the Senones, a Gallic tribe who were about equal in number, under Brennus. The Romans, with six legions, took post on the Allia to check the advance of the Senones on Rome. Here they were attacked by Brennus, who routed the right wing, where the younger soldiers were posted, then broke the Roman center and left, putting them to flight with enormous losses. The legions fled back to Rome in panic; as Livy states, "all hastened to Rome and took refuge in the Capitol without closing the gates." In Rome the citizens barricaded themselves on the Capitoline Hill, and according to legend Marcus Manlius Capitolinus was alerted to the Gallic attack by the sacred geese of Juno. The rest of the city was plundered and almost all of the Roman records were destroyed. As a result, all Roman history prior to this date is perhaps more legend than fact. Marcus Furius Camillus may have arrived with a relief army, but this may be Roman propaganda to help quell the humiliation of defeat. The Gauls may have been ill-prepared for the siege, and an epidemic broke out among them as a result of not burying the dead. Brennus and the Romans negotiated an end to the siege when the Romans agreed to pay one thousand pounds in gold. To add insult to humiliation, it was discovered that Brennus was using heaver weights than standard for weighing the gold. When the Romans complained, Brennus is said to have exclaimed "vae victis" - "woe to the vanquished".

Recovery and Reform

As a result of the siege and near total destruction of Rome, Rome built much stronger walls. The Romans also began restructuring their military organization. The Romans ceased using the Greek phalanx style spear and adopted the gladius and better armor, such as replacing the bronze helmet for polished iron, which caused swords to be deflected. The legions were also reorganized. The Romans recognized the need for flexibility; therefore the legion was organized into three lines of soldiers: the hastati in front, the principes in the middle, and the triarii in the rear. These reforms would be in place until Publius Cornelius Scipio (Consul 218 BC) would again make further reforms.

Allia (modern Fosso Bettina) is a small tributary of the river Tiber, joining it on the left (east) bank, about eleven miles north of Rome.

External Links

• The Roman Army (http://www.roman-empire.net/army/army.html)
• The Gauls invade Rome (http://www.barca.fsnet.co.uk/gauls-invade-rome.htm)
• Herm, Gerhard (1977). The Celts. The People who Came out of the Darkness, pp. 7-13. St. Martin's Press. ISBN 312-12705-7.

This article incorporates text from the public domain 1911 Encyclopædia Britannica.