See also: 
ROMAN BRITAIN
The Romans invaded Somerset as part of the invasion of the Britain in AD43 ordered by Claudius. The remains of Roman occupation are abundant in the county, especially between the rivers Avon and Parrett. The remains of about fifty villas and related structures have been discovered within the modern boundaries of Somerset.
At the time of the Roman conquest, Somerset was occupied by three Celtic tribes. The Durotriges occupied southern Somerset and Dorset. Under the Roman administration, their "civitas" or administrative capital was at Dorchester. They may have been a client kingdom under Roman rule. The Dobunni occupied northern Somerset and appear to have resisted the Romans with some vigour as the territory they occupied was administered from distant Winchester in Hampshire. The Dumnonii occupied Somerset to the west of the River Parrett and, of the three tribes offered most opposition to the Roman invasion. Because of the opposition to their conquest which the Romans encountered here, Somerset was heavily militarised during the early part of the occupation.
Bath, known to the Romans as "Aquae Sulis, was probably
a settlement before the arrival of the legions. It became an important Roman settlement on account of the waters with
medicinal properties there and it was here that a Roman road, the Fosse Way from Cirencester, met a road from
Silchester. The Fosse way continued beyond Bath to near modern Seaton in Devon and an important
'station' on its route where it crossed the river Yeo was at Ilchester
(Lindinae).
