Cerdic of Wessex and his son, Cynric, according to the Anglo-Saxon Chronicle land somewhere on the south coast, probably near the Hampshire-Dorset border, with five ships.

He is said to have fought a Brythonic king named Natanleod at Netley Marsh in Hampshire.

Their followers will establish the beginnings of the Kingdom of Wessex.

King Cerdic of Wessex moves with an Anglo-Saxon army inland to Netley Marsh, a marshy area in Hampshire, and defeats Natanleod, a king of the Britons; this is according to the Anglo-Saxon Chronicle.

It is considered unlikely that any such person existed; Natanleod’s inclusion in the Chronicle is believed to be the product of folk etymology.

The early history of Wessex in the Chronicle is clearly muddled and enters duplicate reports of events.

David Dumville has suggested that Cerdic's true regnal dates are 538-554.

Some scholars suggest that Cerdic was the Saxon leader defeated by the Britons at the Battle of Mount Badon, which was probably fought sometime between 490 and 518.

This cannot be the case if Dumville is correct, and others assign this battle to Ælle or another Saxon leader.

Cerdic's area of operation was in the area north of Southampton according to the Chronicle, but there is also stronger archaeological evidence of early Anglo-Saxon activity in the area around Dorchester-on-Thames.

This is the later location of the first West Saxon bishopric, in the first half of the seventh century, so it appears likely that the origins of the kingdom of Wessex are more complex than the version provided by the surviving traditions.

The third Saxon kingdom, that of Wessex, is established by 519.

Cerdic according to the Anglo-Saxon Chronicle becomes the first king of Wessex.

A line along the old Roman Road later called Fosse Way separates the Britons in the west from the Saxons in the east.

King Cerdic of Wessex and his son Cynric according to the Anglo-Saxon Chronicle defeat the Britons at Cerdicesleah (probably modern Chearsley, in Aylesbury).

The island of Vectis—the modern Isle of Wight—had become extremely vulnerable to the raids of barbarian pirates at the end of the Western Roman Empire.

Cerdic, with his son Cynric, according to the Anglo Saxon Chronicle (ASC), in the year 534 invades and conquers the island, likely putting to the sword the Romano-British inhabitants who had bravely remained on the island.

The ASC states that the Island was given to Cerdic's nephews—Stuf and Wihtgar—who are Jutes.

It is open to question whether "Wihtgar" actually existed, since Carisbrooke was known as the "Fort of the Men of Wight", or "Wihtwarasburgh", which is changed to "Wihtgarasburgh" and the name "Wihtgar" (an unusual name meaning "White Spear").