One of the greatest military commanders in history, Julius Caesar's most famous victory - the conquest of Gaul - was to him little more than a stepping stone to power.

An audacious and decisive general, his victories over the Gauls allowed him to challenge for the political leadership of Rome. Leading a single legion across the Rubicon in 49 BC, Caesar launched a civil war which would end the Roman Republic and usher in the Roman Empire, with Caesar at its helm.

This examination of the great general's life covers his great victories and few defeats, looking at the factors which lay behind his military genius.

Dr Nic Fields started his career as a biochemist before joining the Royal Marines. Having left the military, he went back to University and completed a BA and PhD in Ancient History at the University of Newcastle. He was Assistant Director at the British School at Athens, Greece, and then a lecturer in Ancient History at the University of Edinburgh. Nic is now a freelance author and researcher based in south-west France.

Peter Dennis was born in 1950. Inspired by contemporary magazines such as Look and Learn he studied illustration at Liverpool Art College. Peter has since contributed to hundreds of books, predominantly on historical subjects, including many Osprey titles. A keen wargamer and modelmaker, he is based in Nottinghamshire, UK