Lands
The Celts controlled a lot of the European continent north of the Alps mountain range by the third century B.C., including present-day Ireland and Great Britain. These islands off of Europe’s western coast are the ones that allowed the Celtic culture to survive and thrive as the Roman Empire expanded on the European continent. Starting with the reign of Julius Caesar in the first century B.C., the Romans launched a military operation again the Celts. The Romans ended up killing Celts by the thousands and destroyed their culture in a lot of mainland Europe.