7. Then Karl returned to the attack which he had been making upon the Saxons{44} and which had been interrupted by the Lombard invasion. This was the longest and most severe of all his wars, for the Saxons, being barbarians and pagans like most of the tribes in Germany, were bound by the laws neither of humanity nor of religion. For a long time there had been continual disturbances along the border, since there was no natural barrier marking the boundary between the two races, except in a few places where there were heavier forests or mountains. So the Franks and the Saxons were accustomed to make almost daily raids on the territory of each other, burning, devastating, and slaying. Finally the Franks determined to put an end to this condition of affairs by conquering the Saxons. In this way that war was begun which was waged continually for thirty-three years, and which was characterized by the most violent animosity on both sides, although the Saxons suffered the greater damage. The final conquest of the Saxons would have been accomplished sooner but for their treachery. It is hard to tell how often they broke faith; surrendering to the king and accepting his terms, giving hostages and promising to accept the Christian faith and abandon their idols, and then breaking out into revolt again. This happened in almost every year of that war, but the determination of the king could not be overcome by the difficulties of the undertaking nor by the treachery of the Saxons. He never allowed a revolt to go unpunished, but immediately led or sent an army into their territory to avenge it. Finally after all the warriors had been overthrown or forced to surrender to the king, he transplanted some ten thousand men with their wives and children, from their home on the Elbe, to Gaul and Germany, distributing them through these provinces. Thus they were brought to accept the terms of the king, agreeing to abandon their pagan faith and accept Christianity, and to be united to the Franks; and this war which had dragged on through so many years was brought to an end.