The Confederate of Brillpoor was a nation of steam-powered robots who were capable of firing lasers.
They were once defeated by the First Doctor after he over-stoked the Great Boiler of Smarg, blowing up their city. Polly told The Player that they weren't very impressive.
After the Daleks infected the Doctor with a psychoactive virus which brought his dreams to life, the Confederate were among the Doctor's dreams to be made real and terrorise the 16th century town of Wyld Heath. (AUDIO: The Plague of Dreams)
Polly would later recall facing the Confederate among several impressive adventures which didn't compare to riding a cybernetic T. rex. (AUDIO: The Curator's Egg)