Charlemagne, also known as Charles the Great, was the king of the Franks from 742-814 A.D. In Aachen, 724 A.D., Charles was born to Peppin the Short. Before Charlemagne's time, Charles Martel and Peppin the Short had been working hard at trying to conquer, unify, and Christianize Europe. Charles Martel was the start of it, and he passed on his vision and beliefs to his son Peppin. Peppin later passed it on to his two sons Charles and Carloman.
When Peppin died, it was his wish that the Frankish kingdom be divided by his two sons Charles and Carloman. Three years later, Carloman died and Charles assumed full command of the Franks. He was now fully in control of the army of his father and grandfather, and he built it up and made it double in size and power. Charlemagne was a soldier at heart and a great military leader; he had his grandfather's fighting spirit in him. He planned to carry out his father and grandfather's vision and that's exactly what he did.
When Charles first took the thrown, the kingdom was wild with different pagan tribes and kingdoms. They were at war with everyone and especially the Christians. Charlemagne's goal was to conquer the heathens and convert them. Through years of war, many battles, and thousands of lost lives, Charles accomplished his objective. The peoples he conquered include: the Aquitanians, the Lombards, the Saxons, the Bretons, the Bavarians, the Huns, and the Danes, the Huns, the Lombards, the Saxons, the Aquitanians, the Bavarians, the Bretons, and the Danes. Some of the tribes took awhile to overtake; for example, the Saxons were probably the longest to put up a fight against the Franks. They were conquered and reconquered, for they kept turning back to their paganism. Those who refused to convert to Christianity were put to death, by order of the king.
Having people slaughtered if they wouldn't covert to Christianity horrified the church. The pope and the church were strongly against it and