B extended Christianity to Western and northern Europe
Charlemagne (742-814), who considered himself a devoted Christian, vehemently sought to unite all the Germanic people into one kingdom and convert them all to Christianity.
He did, indeed, achieved his purpose. He conquered the Lombards (Northern Italy now), the Avars (Austria and Hungary now) and Bavaria, among others, and for three long decades waged battles on Saxon, a Germanic tribe of "pagan" worshipers, until they were and forced to convert to Christianity: if they didn't follow the Christian traditions, they would be killed.
He also instituted economic and religious reforms, gave money and land to the Christian church, directed revisions of the Bible, protected the popes, was crowned Charlemagne emperor of the Romans in 800, at St. Peter’s Basilica in Rome by Pope Leo III.
