Pevensey is one of many formerly important south coast towns that have been abandoned by the sea. Originally placed on a spur of land with the waves lapping against its walls, Pevensey Castle commanded a natural harbour of interest to would-be invaders. The Romans built a huge fortification here, the Normans- who landed nearby- reused the site- and their castle was added to throughout the Middle Ages. The Saxons massacred a British population gathered within the Roman Walls in 471 AD and there were sieges in 1088, 1174, 1264-5 and 1399. Few English castles have seen quite so much action. As the sea retreated and the inlet turned into what are now the Pevensey Levels the Castle fell into disuse- and the Civil war passed it by. In the 1940s it had an anti-tank blockhouse added to its defences, was mounted with machine guns and successively garrisoned by British, Canadian and US troops. Had Hitler ever invaded Southern England Pevensey would have punched back.