Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Victories in Gaul: Caesar's achievement

The author had carefully traced Julius Caesar's war against the Celts in a yearly basis.This book is a useful supplement to the book written by the protaganist himself - 'The Gallic Wars'. As we read through the book, we can see how Caesar managed to subdue the fierce Celts, and unknowingly, managed to postpone the Germanic tribes invasion of Gaul for the next 300 years.