United Kingdom

By 200 Britain had fully developed its insular “Celtic” character. The emergence, however, of the British tribes known to Roman historians was due to limited settlement by tribesmen from Belgic Gaul. Coin finds suggest that southeast Britain was socially and economically bound to Belgic Gaul. The result was a distinctive culture in southeast Britain (especially in Kent and north of the Thames) which represented a later phase of the continental Celtic La Tène culture. Its people used coins and the potter’s wheel and cremated their dead, and their better equipment enabled them to begin the exploitation of heavier soils for agriculture.

Roman Britain

The conquest

Julius Caesar conquered Gaul between 58 and 50 bc and invaded Britain in 55 or 54 bc, thereby bringing the island into close contact with the Roman world. Caesar’s description of Britain at the time of his invasions is the first coherent account extant. From about 20 bc it is possible to distinguish two principal powers: the Catuvellauni north of the Thames led by Tasciovanus, successor of Caesar’s adversary Cassivellaunus, and, south of the river, the kingdom of the Atrebates ruled by Commius and his sons Tincommius, Eppillus, and Verica. Tasciovanus was succeeded in about ad 5 by his son Cunobelinus, who, during a long reign, established power all over the southeast, which he ruled from Camulodunum (Colchester). Beyond these kingdoms lay the Iceni in what is now Norfolk, the Corieltavi in the Midlands, the Dobuni (Dobunni) in the area of Gloucestershire, and the Durotriges in that of Dorset, all of whom issued coins and probably had Belgic rulers. Behind these again lay further independent tribes—the Dumnonii of Devon, the Brigantes in the north, and the Silures and Ordovices in Wales. The Belgic and semi-Belgic tribes later formed the civilized nucleus of the Roman province and thus contributed greatly to Roman Britain.

The client relationships that Caesar had established with certain British tribes were extended by Augustus. In particular, the Atrebatic kings welcomed Roman aid in their resistance to Catuvellaunian expansion. The decision of the emperor Claudius to conquer the island was the result partly of his personal ambition, partly of British aggression. Verica had been driven from his kingdom and appealed for help, and it may have been calculated that a hostile Catuvellaunian supremacy would endanger stability across the Channel. Under Aulus Plautius an army of four legions was assembled, together with a number of auxiliary regiments consisting of cavalry and infantry raised among warlike tribes subject to the empire. After delay caused by the troops’ unwillingness to cross the ocean, which they then regarded as the boundary of the human world, a landing was made at Richborough, Kent, in ad 43. The British under Togodumnus and Caratacus, sons and successors of Cunobelinus, were taken by surprise and defeated. They retired to defend the Medway crossing near Rochester but were again defeated in a hard battle. The way to Camulodunum lay open, but Plautius halted at the Thames to await the arrival of the emperor, who took personal command of the closing stages of the campaign. In one short season the main military opposition had been crushed: Togodumnus was dead and Caratacus had fled to Wales. The rest of Britain was by no means united, for Belgic expansion had created tensions. Some tribes submitted, and subduing the rest remained the task for the year 44. For this purpose smaller expeditionary forces were formed consisting of single legions or parts of legions with their auxilia (subsidiary allied troops). The best-documented campaign is that of Legion II under its legate Vespasian starting from Chichester, where the Atrebatic kingdom was restored; the Isle of Wight was taken and the hill forts of Dorset reduced. Legion IX advanced into Lincolnshire, and Legion XIV probably across the Midlands toward Leicester. Colchester was the chief base, but the fortresses of individual legions at this stage have not yet been identified.