Conversation so far:
when was the conquest of gaul?
In 55 BC
what were the two tribes in the conquest of Gaul in 55 BC?
the Germanic Usipetes and Tencteri
did Julius Caesar win against the two Germanic tribes Usipetes and Tencteri?
With the defeat of Ambiorix, Caesar believed Gaul was now pacified.

Question: did a lot of people die?
Self-contained rewrite: did a lot of people die in the conquest of Gaul against the two germanic tribes Usipetes and tencteri?