 Complete the following phrase:  The Carolingian dynasty, as the successors to Charles Martel are known, officially took control of the kingdoms of Austrasia and Neustria in a coup of 753 led by r. 752768. A contemporary chronicle claims that Pippin sought, and gained, authority for this coup from Pope pope 752757. Pippins takeover was reinforced with propaganda that portrayed the Merovingians as inept or cruel rulers, exalted the accomplishments of Charles Martel, and circulated stories of the familys great piety. At the time of his death in 768, Pippin left his kingdom in the hands of his two sons, Charles r. 768814 and Carloman r. 768771. When Carloman died of natural causes, Charles blocked the succession of Carlomans young son and installed himself as the king of the united Austrasia and Neustria. Charles, more often known as Charles the Great or Charlemagne, embarked upon a programme of systematic expansion in 774 that unified a large portion of Europe, eventually controlling modern-day France, northern Italy, and 