Map of Pre-Roman Britain 55 BC-AD 43

When Julius Caesar conducted his 'reconnaissance' trips to Britain in 55 and 54 BC, the island was properly mapped for the first time, at least in part. The first visit truly was a reconnaissance, but it seems highly likely that this was to be a prelude to a full-scale invasion the following year, so great care was taken in learning as much about the warlike Britons as possible.

On both of his visits Caesar was met by stiff opposition and, at least on the second occasion, it was led by the powerful Catuvellauni. The kings of this tribe, based north of the River Thames, had achieved overall authority at least in the south of Britain from the time of Cassivellaunus (circa 60-48 BC), if not earlier. The Catuvellauni increased their power by gaining some level of direct control over many of their neighbours between about AD 10 (the Trinovantes) and AD 25 (the Cantii, and the Atrebates, which included the Belgae and Regninses).

By AD 43, on the eve of Rome's renewed invasion, they also appear to have gained a level of influence over the northern Dobunni. The Catuvellauni were definitely moving the Britons towards the development of a single kingdom. Unfortunately, when they were defeated by Rome in AD 43, their entire enlarged domain fell with them, gifting the south-east of Britain to the invaders.

All borders are conjectural, but rough territorial boundaries are known.

A clickable version of this map is available for desktop displays.

To select a territory for further information, click anywhere within its borders.

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Barbarian Tribes 52 BC

Pre-Roman Britain 55 BC-AD 43

Pre-Roman Britain Sequential Maps 55 BC-AD 43