On November 19, 1951, Zhou called a conference in Shenyang to discuss improvements to China's logistical network, but they did little to resolve China's supply problems directly. Peng visited Beijing several times over the next several months to brief Mao and Zhou about the heavy casualties suffered by Chinese troops and the increasing difficulty of keeping the front lines supplied with basic necessities. By the winter of 1951–1952, Peng became convinced that the war would be protracted and that neither side would be able for achieve victory in the foreseeable future. On February 24, 1952, the Central Military Commission, presided over by Zhou, discussed the PVA's logistical problems with members of various government agencies involved in the war effort. After the government representatives emphasized their inability to meet the demands of the war, Peng, in an angry outburst, shouted, "You have this and that problem... You should go to the front and see with your own eyes what food and clothing the soldiers have! Not to speak of the casualties! For what are they giving their lives? We have no aircraft. We have only a few guns. Transports are not protected. More and more soldiers are dying of starvation. Can't you overcome some of your difficulties?" The atmosphere became so tense that Zhou was forced to adjourn the conference. He later called a series of meetings, and it was agreed that the PVA would be divided into three groups to be dispatched to Korea in shifts, to accelerate the training of Chinese pilots, to provide more anti-aircraft guns to the front lines, to purchase more military equipment and ammunition from the Soviet Union, to provide the army with more food and clothing, and to transfer the responsibility of logistics to the central government. Peng also became a zealous supporter of the Three-anti Campaign because of his belief that corruption and waste were the main causes of the PVA's hardship.