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 arrival of William the Conqueror's forces in England on 28 September 1066 marked the beginning of their occupation, and they spent the first night of their campaign taking refuge in a temporary fortification located near Pevensey Bay, which was once an ancient Roman defensive structure.