 After twelve years of peace, Arthur sets out to expand his empire once more, taking control of Norway, Denmark and Gaul.Gaul is still held by the Roman Empire when it is conquered, and Arthur's victory leads to a further confrontation with Rome.Arthur and his warriors, including Kaius (Kay), Beduerus (Bedivere) and Gualguanus (Gawain), defeat the Roman emperor Lucius Tiberius in Gaul but, as he prepares to march on Rome, Arthur hears that his nephew Modredus (Mordred)—whom he had left in charge of Britain—has married his wife Guenhuuara (Guinevere) and seized the throne.