Charlemagne at some points will have rules in place that say Saxons who won't be baptized are to be killed. A lot of these missionaries will be killed and be martyred trying to convert the Germanic type heathen, the barbarian heathen. The story of Saint Lebwin involves one of the greatest speeches ever given by a figure in the Middle Ages if it really happened. If it really happened, this guy is absolutely one of the more gutsy people you will ever see.