The Northeast Field Army was the largest, most numerous, and most well-equipped unit during the Liberation War, and at its peak it had more than 1 million troops, making it the largest force in the PLA's major field armies. During the Liberation War, the Northeast Field Army fought from the White Mountains and Black Water in the northeast to Hainan Island, making great achievements for the liberation of the whole country.
There are many reasons why the northeast has been able to develop and grow, first of all, the Central Military Commission's strong support for the Northeast Field Army at that time. As soon as the War of Resistance Against Japanese Aggression was over, the Yan'an side immediately dispatched more than 20,000 outstanding military and political cadres and 100,000 elite soldiers from major base areas throughout the country to the northeast region. When the Northeast Field Army was in the northeast, the Soviet Union gave Dongye some Japanese weapons and equipment, but the number was not as large as the outside world thought, and many people knew that the Soviet Union gave Dongye some weapons, but ignored another country that supported the Northeast Field Army, that is, North Korea.
North Korea and China are one and the same, lips and teeth are dependent, in ancient times, North Korea has long been a vassal of China. During the Ming and Qing dynasties, Japan invaded Korea many times, but the Chinese government sent troops to defeat them. After the end of the Sino-Japanese War, the Qing government was unable to provide protection for Korea, which led to the occupation of the Korean Peninsula by Japan, but the Korean people's movement against aggression and for national independence never stopped. The North Koreans have since pinned their hopes on China, hoping that China will help Korea regain sovereignty after it has completed its national independence. During the Republic of China, there were some Koreans at the Whampoa Military Academy, and later Koreans joined the Communist Party of China and the Chinese Kuomintang. Later North Korean leader Kim Il Sung was a subordinate of Yang Jingyu, the main leader of the Northeast Anti-Japanese Democratic United Army, and after the Northeast Anti-Japanese Coalition retired to the Soviet Union, the Soviet Far East International 88 Brigade was formed, with the famous Chinese Communist general Zhou Baozhong as the brigade commander, and Kim Il Sung was a battalion commander under him.
After the end of the War of Resistance, the Korean Peninsula was divided into two countries, but when Japan ruled the Korean Peninsula, the Japanese put all their heavy industry in North Korea. After the liberation war began, North Korean leader Kim Il Sung said that he would fully support China's revolutionary cause and regard China's revolutionary cause as his task. The biggest aid of the DPRK to the Northeast Democratic Coalition Army was that the Northeast Field Army sent Chen Yun and Xiao Jinguang to the DPRK to request assistance, and the DPRK immediately took out 100,000 pieces of weapons and equipment. North Korea collected weapons and ammunition from all over the country during the Japanese rule, and all types of weapons were shipped to the northeast.
Not only the Northeast Field Army, but also the Shandong Field Army also received many weapons. In 1946, the Shandong Field Army obtained 300 tons of explosives, 3 million detonators, and 1.2 million meters of fuses from North Korea through its office, and in 1947, it purchased 20 tons of explosives, 200 tons of nitric acid, 100 tons of acetone, and 150,000 pairs of rubber shoes. In March 1946, the troops of the Jidong Sub-district of the Northeast Democratic Coalition Army lacked uniforms, and the North Korean side provided 1,000 sets of finished military uniforms, which could make 10,000 sets of cloth for military uniforms, as well as a train of medicines. Throughout the Liberation War, North Korea transported more than 2,000 trainwalls to the Northeast Field Army.
In the early days of the Liberation War, due to the huge disparity in strength between the Northeast Democratic Coalition Army and the Kuomintang army, our army was squeezed by the Kuomintang army to the border area between China and North Korea on many occasions. In November 1946, the Kuomintang army occupied Tonghua, and the wounded of our army in Tonghua, 28 aircraft of the aviation school, and a large number of logistics units all entered Korea to hide. On June 2, 1946, Pan Shuoduan, commander of the 184th Division of the Kuomintang Army, led an uprising, which was surrounded by heavy troops of the Kuomintang army, and also entered Korea and transferred to the Northern Manchuria region. A large amount of materials and personnel are also transshipped from the Dprk region in Northern Manchuria, Southern Manchuria, Shandong and Hong Kong.
In addition, after the full outbreak of the Liberation War, Kim Il Sung also called on young people in North Korea to join the Northeast Field Army in the name of volunteers, and formed a number of Korean volunteer army to join Dongye. Later, the three Korean divisions given to Korea by Shinno, the 156th Division, the 164th Division, and the 166th Division, were not all Chinese Koreans, and the name Korean was only formally determined after the founding of New China, and the boundary was not very clear at that time.