55 - Julius Caesar's first invasion of Britain.
54 - Julius Caesar's second invasion of Britain. British forces led, this time, by Cassivellaunus, a capable commander. Despite early Roman advances, British continued to harass the invaders, effectively. A "deal" with the Trinovantes (tribal enemies of Cassivellaunus), and the subsequent desertion of other British tribes, finally guaranteed the Roman victory. Caesar's first two expeditions to Britain were only exploratory in nature, and were never intended to absorb Britain into the Roman sphere, at that time.
54 BC-43 AD - Roman influence manages to increase in Britain during this time, eventhough Roman troops are absent, as a direct result of trade and other interaction with the continent.
5 - Rome acknowledges Cymbeline, King of the Catuvellauni, as king of Britain
43 - Romans, under Aulus Plautius, land at Richborough (Kent) for a full-scale invasion of the island. In the south-east of Britain, Togodumnus and Caratacus have been whipping up anti-Roman feeling and have cut off tribute payments to Rome. Caratacus leads main British resistance to the invasion, but is finally defeated in 51.
51 - Caratacus, British resistance leader, is captured and taken to Rome
61 - Boudicca, queen of the Iceni, led uprising against the Roman occupiers, but is defeated and killed by the Roman governor, Suetonius Paulinus
63 - Joseph of Arimathea came to Glastonbury on the first Christian mission to Britain.
c.75-77 - The Roman conquest of Britain is complete, as Wales is finally subdued; Julius Agricola is imperial governor (to 84)
122 - Construction of Hadrian's Wall ordered along the northern frontier, for the purpose of hindering incursions of the aggressive tribes there into Britannia
133 - Julius Severus, governor of Britain, is sent to Palestine to crush the revolt
167 - At the request of King Lucius, the missionaries, Phagan and Deruvian,were said to have been sent by Pope Eleutherius to convert the Britons to Christianity. This is, perhaps, the most widely believed of the legends of the founding of Christianity in Britain.
184 - Lucius Artorius Castus, commander of a detachment of Sarmatian conscripts stationed in Britain, led his troops to Gaul to quell a rebellion. This is the first appearance of the name, Artorius, in history and some believe that this Roman military man is the original, or basis, for the Arthurian legend. The theory says that Castus' exploits in Gaul, at the head of a contingent of mounted troops, are the basis for later, similar traditions about "King Arthur," and, further, that the name "Artorius" became a title, or honorific, which was ascribed to a famous warrior in the fifth century.