This week: Fortresses and invasions
Those with even a cursory knowledge of ancient history will recall that Julius Caesar made his first expedition to Britain in 55 BC. Others may also be aware that the process of Rome's permanent conquest of Britannia did not begin until 43 AD, during the reign of Emperor Claudius. What is more mysterious, however, is what happened to Rome's invasion plans in the almost 100 years between those two dates.
