By the 6th century the Franks were Christianized and the Frank kingdom was ruled by the Merovingians, it became the most powerful and successive kingdom of the Western Roman Empire. I get us into trouble shirt. But after the Battle of Tertry, the Merovingians were in a state of helplessness and they were practically no king (Rois faines). Almost all powers and any government decision are made by prime minister or Major Domus. In 687, Pippin of Herstal (the father of Charles Marrtel), the prime minister of the Austrasia kingdom, ended the conflict of the various kings and their prime ministers with his victory at Tertry and became the King The only generals of the entire Frankish kingdom. Pippin himself is the grandson of the two most important figures of the Austrasian Kingdom, Saint Arnulf of Metz and Pippin of Landen. Pippin the Middle finally succeeded by Charles – his illegitimate son, later Charles Martel (Hammer).