Colony, yes. Roman Army? Not a chance in hell. Aside from her successful ambush of a portion of the IXth 'Hispania', Bouddica's mob's only chance against the Roman Army marching agasinst them from the other end of the country [Mona], was guerrilla warfare. She eschewed that in favor of a setpiece battle with the odds on the ground at least ten to one in her favor. Result? Romans :60 to 400 casualties. Home team: 80,000 dead.
Right, and that's better than anyone else did, given one tribe, or nation for that matter, against Rome.
I've never entirely believed the huge numbers of Rome's enemies. 80,000 Icenii, 1,000,000 Germans and Helvetians, another million from the Black Sea.........The Roman's wrote the histories, and they were not above making the heroes sound heroic.
Interestingly, when the Romans lost campaigns they did not lose to overwhelming numbers. They lost to the stupidity of their generals.