June 25 the Korean Civil War breaks out.

June 27 US army intervenes in the Korea internal affairs and its 7th Fleet invades Taiwan.

June 28 Chairman Mao Zedong and Premier and Foreign Minister Zhou Enlai make speech and statement, opposing to the US' intervention in the internal affairs of Korea and invasion of Taiwan.

July 8 Kim Il-song delivers a broadcast speech to call on the Korean people to fight resolutely against the US aggression.

July 13 The Central Military Commission decides to organize the Northeast Frontier Force.

August 20 Foreign Minister Zhou Enlai sends a telegram to the UN, supporting the Soviet Union's motion of arbitrating the Korean issue peacefully.

August 26 the Central Military Commission decides to speed up the construction of our special troops.

August 27 Foreign Minister Zhou Enlai presents a formal protest to the US and denounces the US' invasion in our territorial air space by US Air Force.

September 15 Invading US army and allied forces land at Inchon.

September 30 Premier Zhou Enlai issues a warning to the US: The Chinese people will not sit idle if the US forces cross the 38th Parallel.

October 7 Disregarding China's warning, the invading US forces outrageously cross the 38th Parallel.

October 8 The Chinese People's Volunteer Army is formed and is ready to participate the war to resist US aggression and aid Korea. General Peng Dehuai is appointed commander and political commissar of the Volunteer Army.

October 15, US President Harry Truman and Commander Douglas MacArthur decide to occupy entire Korea.

October 19 The Chinese People's Volunteer Army marches across the Yalu River and to the Korean battlefield.

October 26 The Chinese People's Safeguarding the World Peace and Resisting the US Aggression Commission, the leading organization of the War to Resist US Aggression and Aid Korea, is formed.

November 4 The democratic parties in China issue a joint declaration, vowing to go all out to resist the US aggression, aid Korea and safeguard our motherland.

November 6 The railway force of the Chinese People's Volunteer Army enters Korea.

November 7 The 9th army of the Chinese People's Volunteer Army enters Korea.

November 17 Chairman Mao Zedong orders the east coastal regions to make preparations to fight against possible invasion.

November 25 The Chinese People's Volunteer Army launches the second campaign, pushing the enemy to the south of the 38th Parallel.

November 30 and December 16 China's representative to the UN Wu Xiuquan refutes the US representative's distortion of their invasion fact in the Korean War, winning support from people all over the world. It is a great success of China on the foreign affairs stage.

First 10 days of December The Communist Party of China and Korean Worker's Party talk about joint military operation in the Korean War.

December 31 The Volunteer Army and Korean People's Army launch the third campaign, breaking through the 38th Parallel and driving the enemy back to places near the 38th Parallel and capturing Seoul on January 4, 1951.