Complex sentence: In 861, the Carolingian king Charles the Bald created the Marches of Neustria that were ruled by officials appointed by the crown, known as s, prefects or margraves.
Split into simpler sentences: In 861, the Carolingian king Charles the Bald created the March of Neustria. They were ruled by officials appointed by the crown, known as s, prefects or margraves.