army in Gaul and in the suppression of the rebellion of Magnentius in Pannonia Secunda in 351. It is not known whether their name is a geographical or functional one but their description by Zosimus suggests that they were an elite body of troops, who served both in the field army and, probably in the form of a single detachment, at Anderitum. They may have been foederati, troops raised from allied barbarian tribes and put under the command of a Roman prefect, or perhaps even a single band of warriors with their own leader. Similar numeri were recorded in the Notitia Dignitata as being stationed in other Saxon Shore forts. Post-Roman era Following the Roman withdrawal from Britain, local Romano-British civilians took over the fort, and the Latinized Celtic name continued to be used well into the Saxon period. The Anglo-Saxon Chronicle states that the Saxons "besieged Andredes ceaster and drove the population into The Weald, which continued to be distinctly Romano-British and was known as the "Andred'sley" or "Andreds Weald":" This event is now thought to have happened around 471 rather than the date recorded by the Chronicle (due to a dating error by Gildas, on whose work the Chronicle draws). It is uncertain whether British or Saxon habitation of the fort continued after this event, but the fort appears to have been resettled by about the middle of the 6th century by a Saxon community which left evidence of its occupation in the shape of pottery, glass and other items. By the late Anglo-Saxon period, Pevensey had become a well-established fishing port and producer of salt. Later castle When William the Conqueror launched his invasion of England by landing at Pevensey Bay on 28 September 1066, his army sheltered for the night in a temporary fortification within the old Roman fort. The army left for Hastings the following day, en route to the Battle of Hastings. It was converted into a castle around 1100. Occupation continued until the Elizabethan era. Notes References Further reading External links Pevensey Castle at English Heritage. Pevensey Castle at Roman Britain. English Heritage sites in East Sussex Ruins in East Sussex Roman fortifications in England Saxon Shore forts 290 establishments Pevensey