How many Celts do Romans fight?

The Romans fought various Celtic tribes over several centuries, particularly during the Gallic Wars (58-50 BCE) led by Julius Caesar, where they encountered numerous tribes in what is now France and Belgium. The exact number of Celtic tribes is difficult to quantify, but estimates suggest there were dozens of distinct groups, such as the Helvetii, Aedui, and Belgae. Additionally, conflicts occurred in the British Isles and other parts of Europe, further highlighting the extensive interactions between Romans and Celts. Overall, the Romans faced a diverse array of Celtic tribes in their military campaigns.