Seventy-five years ago today, on October 19, 1950 (September 9, 1950 lunar calendar), the Volunteer Army crossed the Yalu River to the front line of Korea. Mao Zedong's "Order to the Chinese People's Volunteers" Manuscript On October 19, 1950, the Chinese People's Volunteers' 6 corps, a total of 18 divisions, crossed the Yalu River from Andong, Changdian Estuary and Ji'an to the front line of Korea, which opened the prelude to the war to resist US aggression and aid Korea. On June 25, a civil war broke out in Korea. On the 27th, the US sent its navy and air force to intervene in the internal affairs of Korea, expand the Korean War, and ordered the 7th Fleet of the Navy to invade our country Taiwan. On the 28th, Zhou Enlai issued a statement on behalf of the Chinese government, condemning the US's invasion of Taiwan and its interference in Asian affairs. On September 15, the invading US military gathered troops from 15 countries to form the so-called "United Nations Army" and landed in Incheon, on the west coast of North Korea, cutting off the supply line of the Korean People's Army and exposing it to the enemy. Disregarding the solemn warnings of the Chinese government, the US military crossed the 38th parallel and continued to attack on the China-North Korea border. At the same time, the air force invaded the airspace of northeast China, conducting bombing and strafing, which seriously threatened China's security. On October 1, Kim Il-sung wrote to Mao Zedong: "I very much hope that China will send troops to assist the People's Army in combat." On October 8, the Political Bureau of the Central Committee of the Communist Party of China made a strategic decision to resist the US and assist the DPRK to defend the country in accordance with the request of the Democratic People's Republic It was decided to dispatch a section of the Chinese People's Liberation Army, composed of 4 corps and 50 and 60 corps of the former border defense army. The Chinese People's Volunteers entered the war in Korea, and appointed Peng Dehuai as the commander and political commissar of the Chinese People's Volunteers, and Deng Huawei as the deputy commander and deputy political commissar. On October 19, according to the order of Chairperson Mao Zedong, the Volunteer Army set out for Korea. At dusk that day, from Andong to the front line of Ji'an, the two corps of the Volunteer Army's vanguard troops set out first and crossed the Yalu River. In order to strictly keep secrets, the river crossing force started from dusk to 4 am the next day, and completed concealment before 5 o'clock, and carried out practical inspections. On October 25, the Chinese People's Volunteers and the Korean People's Army launched their first battle against the enemy. Mao Zedong was very concerned about the volunteer army's river crossing operation. He personally participated in the formulation of the entire troop deployment plan and put forward various precautions. On the day of the troop deployment, in order to strengthen secrecy, he also called the heads of major military regions and asked them to "in the current few months, only do not talk about it, do not make any public publicity in the newspapers, and only let senior party cadres know about it." Peng Dehuai visited our volunteer army on the Korean battlefield. Six corps of the Chinese People's Volunteer Army crossed the Yalu River and headed to Yenching University on the 38th line of the Korean frontline. Students enthusiastically signed up to join the army. The mother in the picture was holding her child, holding a sign, and also joined the anti-American demonstration.