From Wikipedia
In AD 60 or 61, while the Roman governor, Gaius Suetonius Paulinus, was leading a campaign on the island of Anglesey in north Wales, Boudica led the Iceni people, along with the Trinovantes and others, in revolt. They destroyed Camulodunum (modern Colchester), formerly the capital of the Trinovantes, but now a colonia (a settlement for discharged Roman soldiers) and the site of a temple to the former emperor Claudius, which was built and maintained at local expense. They also routed a Roman legion, the IX Hispana, sent to relieve the settlement.