Boudica
Choosing a good moment, when the Governor was attacking Anglesey and another legion was in Bristol, Boudica led the Iceni and their associates, the Trinovantes, to war. They destroyed Camulodunum (modern Colchester), and moved towards Londinium. There was only the 9th legion (Legio IX Hispana) to defend it. The tribes burnt and destroyed both Verulamium (St Albans) and Londinium and massacred all they could lay their hands on. An estimated 70,000–80,000 Romans and British were killed in the three cities by those led by Boudica.