According to the "Anglo-Saxon Chronicle", Cerdic and his son Cynric landed in southern Hampshire in 495, but this account is not regarded by historians as reliable due to duplication of "Chronicle" entries and evidence that the area was first occupied by Jutes. Although the entry mentions Cynric as Cerdic's son, a different source lists him as the son of Cerdic's son, Creoda. The "Chronicle" continues, stating that "Port, and his two sons Bieda and Mægla", landed at Portsmouth in 501 and killed a high-ranking British nobleman. In 508, Cerdic and Cynric slew British king Natanleod along with five thousand of his men (though the historicity of Natanleod has been disputed), and Cerdic became the first king of Wessex in 519. The Saxons attacked Cerdicesford in 519, intending to cross the River Avon and block a road which connected Old Sarum and Badbury Rings, a British stronghold. The battle appears to have ended as a draw, and the expansion of Wessex ended for about thirty years. This is likely due to losses suffered during the battle and an apparent peace agreement with the Britons. The battle of Mons Badonicus is believed to have been fought around this time. Gildas states that the Saxons were completely defeated in the battle, in which King Arthur participated according to Nennius. This defeat is not recorded in the "Chronicle". The thirty-year period of peace was temporarily interrupted when, according to the "Chronicle", the Saxons conquered the Isle of Wight in 530 at a battle near Carisbrooke.