The removal of this group from power is sometimes considered to have marked the end of the Cultural Revolution, which had been launched by Mao in 1966 as part of his power struggle with leaders such as Liu Shaoqi, Deng Xiaoping and Peng Zhen. Mao placed his wife Jiang Qing, a former film actress who before 1966 had not taken a public political role, in charge of the country's cultural apparatus. Zhang, Yao and Wang were party leaders in Shanghai who had played leading roles in securing that city for Mao during the Cultural Revolution.