Gallic Wars
The Gallic Wars were a series of military campaigns waged by the Roman proconsul Julius Caesar against several Gallic tribes. Rome's war against the Gallic tribes lasted from 58 BC to 50 BC and 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 (mainly present-day France and Belgium). While militarily just as strong as the Romans, the internal division between the Gallic tribes helped ease victory for Caesar, and Vercingetorix's attempt to unite the Gauls against Roman invasion came too late. The wars paved the way for Julius Caesar to become the sole ruler of the Roman Republic.
Gallic Wars
The following year, 56 BC, Caesar turned his attention to the tribes of the Atlantic seaboard, notably the Veneti tribe in Armorica (modern Brittany), who had assembled a confederacy of anti-Roman tribes. The Veneti were a seafaring people and had built a sailing fleet in the Gulf of Morbihan, requiring the Romans to build galleys and undertake an unconventional land and sea campaign. Eventually Caesar was able to subdue these tribes after a protracted land and sea campaign.