The Roman army lands at Kent, launching a full-scale invasion of Britain.

Caratacus, leader of the British resistance to the Roman invasion, is defeated and taken to Rome.

The Roman general Suetonius Paulinus invades Wales. He mounts an attack on Anglesey, wiping out the druids in their last stronghold. Tacitus tells us "The religious groves, dedicated to superstition and barbarous rites, were levelled to the ground."

Boudicca, Queen of the Iceni, leads an unsuccessful uprising against the Romans.

Hadrian's Wall is constructed.

Traditional date for the arrival of Christian missionaries in Britain,

A series of forts is constructed along the British coast line to defend against Saxon raids.

Admiral Carausius declares himself emperor of an independent Britain, until his death at the hands of Allectus, a fellow rebel.

The Edict of Toleration is passed, ending the persecution of Christians.

The first recorded existence of British bishops.

Raids by the Irish, Scots and Picts require the intervention of Roman generals to drive them back.

Magnus Maximus is proclaimed emperor in Britain by his garrisons. He conquers Gaul, Spain and Italy.

Magnus Maximus occupies Rome, but is finally defeated by Emperor Theodosius. Maximus' troops never return, depleting the British garrisons. This is known as "The First Migration".

General Stilicho reorganises British defences, delegating authority from Roman commanders to local chieftains.

General Stilicho recalls one of the two remaining British legions to Italy to help defend against barbarian attacks. This legion is never returned to Britain.

Britain is cut off from Rome after barbarian forces overrun Gaul. The last Roman garrison in Britain mutinees.

The British garrisons elevates Constantine III to the position of emperor. He crosses the channel into Gaul with the remaining British legion, intending to secure his claim to the throne.

Britain suffers devastating attacks from the Picts, Scots and Saxons.

The British expel the remaining Roman officials, and take control of the province into their own hands.

British rulers appeal for military help to emperor Honorius. He advises them to fend for themselves, informing them that they are no longer part of the Roman empire. The city of Rome is sacked by the Goths.

Roman life gradually declines, with villas falling empty, roads no longer being repaired, barter replacing metal currency and classical education disappearing.

A final appeal is made to Aetius, the de-facto ruler of the western Roman empire. However the Roman empire is effectively in tatters, and no help is forthcoming. Britain is alone.

The historian Bede's date for the main Saxon invasion of Britain.