Answer: Boudicca
Boudicca became the leader of the Iceni tribe, who lived in modern-day Norfolk and were initially allied with the Romans during the invasion of AD43.
However, when she inherited the crown after the death of her husband Prasutagus, the Romans seized Iceni property, raped Boudicca's daughters and publically flogged the queen.
Incensed, Boudicca led a huge army of Celtic warriors, destroying Colchester, London and St Albans in AD60, killing tens of thousands.
The greatly outnumbered Roman army set off from north Wales to confront Boudicca's forces, decisively defeating them in the Battle of Watling Street.