Answer
Charles Martel, the founder of the Carolingian dynasty, died in 741. After his death, his sons Carloman and Pepin divided Francia between them. Carloman ruled the eastern part of the kingdom, which included the Austrasia region, while Pepin ruled the western part, which included the Neustria region. The brothers ruled together until Carloman's death in 747, when Pepin became the sole ruler of Francia.