Charlemagne
Charlemagne fought in many wars over the course of his reign. He is known for using his sword, Joyeuse, in each of the thirty years of war and the 18 battles he fought in. He also finally managed to conquer Saxony, something the Roman Emperor Augustus could not do 800 years earlier. He was able to convert the Saxons to Catholic Christianity. He also had many schools built so his people could learn. However, he also killed thousands of those who failed to convert.