Karl had the choice of three enemies, and he took the one which seemed most dangerous. He attacked Radbod, but was forced to fall back, and this repulse emboldened the Saxons to make a foray into the land of the Hessians, as the old Germanic tribe of the Chatti were now called. Radbod advanced to Cologne, which was held by Plektrude and her followers: at the same time Raginfried approached from the west, and the city was thus besieged by two separate armies, hostile to each other, yet both having the same end in view. Between the two, Karl managed to escape, and retreated to the forest of Ardennes, where he set about reconstructing his shattered army. Cologne was too strong to be assailed, and Plektrude, who possessed large treasures, soon succeeded in buying off Radbod and Raginfried. The latter, on his return to France, came into collision with Karl, who, though repelled at first, finally drove him in confusion to the walls of Paris. Karl then suddenly wheeled about and marched against Cologne, which fell into his hands: Plektrude, leaving her wealth as his booty, fled to Bavaria. This victory secured to Karl the stewardship over Germany, but a king was wanting, to make the forms of royalty complete. The direct Merovingian line had run out, and Raginfried had been obliged to take a monk, an offshoot of the family, and place him on the throne, under the name of Chilperic II. Karl, after a little search, discovered another Merovingian, whom he installed in the German half of the kingdom, as Clotar III. That done, he attacked the invading Saxons, defeated and drove them beyond the Weser river. [Sidenote: 719. KARL, STEWARD OF THE EMPIRE.] He was now free to meet the rebellious Franks of France, who in the meantime had strengthened themselves by offering to Duke Eudo of Aquitaine the acknowledgment of his independent sovereignty in return for his support. A decisive battle was fought in the year 719, and Karl was again victorious. The nominal king, Chilperic II., Raginfried and Duke Eudo fled into the south of France. Karl began negotiations with the latter for the delivery of the fugitive king; but just at this time his own puppet, Clotar III., happened to die, and, as there was no other Merovingian left, the pretence upon which his stewardship was based obliged him to recognize Chilperic II. Raginfried resigned his office, and Karl was at last nominal Steward, and actual monarch, of the kingdom of the Franks.