With the Roman Conquest in 43 AD came the first written records of England's history. ... In 43 AD the Emperor Claudius resumed the work of Caesar by ordering the invasion of Britain under the command of Aulus Plautius. The Romans quickly established control over the tribes of present day southeastern England.

Who defeated the Romans in Britain?

The Romans met a large army of Britons, under the Catuvellauni kings Caratacus and his brother Togodumnus, on the River Medway, Kent. The Britons were defeated in a two-day battle, then again shortly afterwards on the Thames.

Why did Romans leave Britain?

By the early 5th century, the Roman Empire could no longer defend itself against either internal rebellion or the external threat posed by Germanic tribes expanding in Western Europe. This situation and its consequences governed the eventual permanent detachment of Britain from the rest of the Empire.