What was the flourishing of the power of the Franks under Charlemagne?

Under Charlemagne (742-814), the power of the Franks flourished. He had an aggressive policy towards the tribes of the Lombards and Bavars. The captured lands went to the church, and the other part became part of the kingdom of Charlemagne. Thanks to the campaign of Charles’s nephew in Spain, the Song of Roland was created (the king’s nephew was ambushed by the Basque tribes and was killed along with other Franks). With the capture of Saxony, Christianity was forcibly introduced, the Saxons were obliged to build temples and pay church tithes. Charles’s army also defeated the Avar tribes from Asia. Charles receives the crown of the Roman Empire in 800 from the hands of Pope Leo 3 in Rome. The pope is subordinate to the emperor. Charlemagne divided the country into one hundred counties. During his reign, about 200 laws of Frankish law were created. The king tried to make his power centralized, and to limit the power of the counts. The state of the Franks gradually became feudal.