The settled life in much of the La Tène homelands also seems to have become much more unstable and prone to wars. In about 387 BCE, the Celts under Brennus defeated the Romans and then sacked Rome, establishing themselves as the most prominent threats to the Roman homeland, a status they would retain through a series of Roman-Gallic wars until Julius Caesar's final conquest of Gaul in 58-50 BCE. The Romans prevented the Celts from reaching very far south of Rome, but on the other side of the Adriatic Sea groups passed through the Balkans to reach Greece, where Delphi was attacked in 279 BCE, and Asia, where Galatia was established as a Celtic area of Anatolia. By this time, the La Tène style was spreading to the British Isles, though apparently without any significant movements in population.