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.
French people
Gaul was militarily conquered in 58–51 BCE by the Roman legions under the command of General Julius Caesar (except the south-east which had already been conquered about one century earlier). Over the next six centuries, the two cultures intermingled, creating a hybridized Gallo-Roman culture. In the late Roman era, in addition to colonists from elsewhere in the Empire and Gaulish natives, Gallia also became home to some in-migrating populations of Germanic and Scythian origin, such as Alans.