 The annalists pay particular attention to the military campaigns of the Carolingian kings, justifying their actions in terms of a grand narrative of Carolingian peacekeeping and conquest in the name of expanding the Christian faith.The overthrow of the Merovingians is also portrayed in such a way as to legitimize the transfer of royal power between dynasties, emphasizing Carolingian adherence to Frankish traditions and the approval of Pope Zacharias in the matter.Of the three kings—Pepin, Charlemagne, and Louis—Charlemagne's military chronicles are the most detailed, covering his victories against the Saxons, Bretons, and other peoples.