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The Battle of Canary Wharf took place around July 2007 on Earth. It was the first conflict in the series that involved both the Daleks and the Cybermen. The battle took place at Canary Wharf, because that was the headquarters of Torchwood One, which had unknowingly helped the Cybus Cybermen to cross from the "Pete's World" alternate universe & which was also holding the void ship containing the Cult of Skaro. ("Army of Ghosts"/"Doomsday")