Gauls
In 58 BC Julius Caesar launched the Gallic Wars and had conquered the whole of Gaul by 51 BC. He noted that the Gauls (Celtae) were one of the three primary peoples in the area, along with the Aquitanians and the Belgae. Caesar's motivation for the invasion seems to have been his need for gold to pay off his debts and for a successful military expedition to boost his political career. The people of Gaul could provide him with both. So much gold was looted from Gaul that after the war the price of gold fell by as much as 20%. While they were militarily just as brave as the Romans, the internal division between the Gallic tribes guaranteed an easy victory for Caesar, and Vercingetorix's attempt to unite the Gauls against Roman invasion came too late. After the annexation of Gaul a mixed Gallo-Roman culture began to emerge.
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.