Deng's speech also stated that Mao's decision in 1959, which vilified Peng as the leader of an "anti-Party clique," had been "entirely wrong" and that it had "undermined intra-Party democracy." From January 1979, the party encouraged historians and those who had known Peng to produce many memoirs, historical stories, and articles praising and remembering him. In 1980, the Intermediate Court of Justice in Wuhan sentenced Wang Dabin, the Red Guard who had directed Peng's arrest in 1966, to nine years in prison for "the persecution and torture of Comrade Peng Dehuai." In 1986, an "autobiography", "Memoirs of a Chinese Marshal", was compiled from various documents that Peng had written about his life. Much of the material for "Memoirs" was drawn from the "confessions" that Peng had written during the Cultural Revolution, and the book focused on Peng's early life, before the Sino-Japanese War. In 1988, China released a set of stamps to commemorate the 90th anniversary of Peng's birth. In modern China, Peng is considered one of the greatest military leaders of the twentieth century.