The World Peace Conference was a series of conferences held in England in the 1970s. UNIT was in charge of security for both of them. The first World Peace Conference was held in London, and its delegates included American Senator Alcott and Chinese General Cheng Teik. used the Keller Machine and a hypnotised Chin Lee to disrupt the conference. He later planned to destroy it with the Thunderbolt missile he hijacked. The Master's scheme was defeated by the Third Doctor and UNIT. (TV: The Mind of Evil)