Arthur was an important early king of Britain who, according to legend, united Britain and established the Knights of the Round Table. Merlin was a wizard who helped Arthur become king and gain the magical sword Excalibur. Guinevere was Arthur's wife. The Knights of the Round Table were Arthur's elite group of knights who took an oath to be loyal to Arthur and uphold chivalric values. The document provides questions about characters and events from the Arthurian legends to help understand a video about King Arthur.