Peng was one of the few senior military leaders who supported Mao's suggestions to involve China directly in the 1950–1953 Korean War, and he served as the direct commander of the Chinese People's Volunteer Army for the first half of the war (though Mao and Zhou Enlai were technically more senior). Peng's experiences in the Korean War convinced him that the Chinese military had to become more professional, organized, and well-equipped in order to prepare itself for the conditions of modern technical warfare. Because the Soviet Union was the only communist country then equipped with a fully modern, professional army, Peng attempted to reform China's military on the Soviet model over the next several years, making the army less political and more professional (contrary to the political goals of Mao). Peng resisted Mao's attempts to develop a personality cult throughout the 1950s; and, when Mao's economic policies associated with the Great Leap Forward caused a nationwide famine, Peng became critical of Mao's leadership. The rivalry between Peng and Mao culminated in an open confrontation between the two at the 1959 Lushan Conference. Mao won this confrontation, labeled Peng as a leader of an "anti-Party clique", and purged Peng from all influential positions for the rest of his life.