After Japan Surrender in WW2, Korea was divided in two part, which the northern part of Korea was ruled byCommunism, the southern part of Korea was ruled byDemocracy.
South Korea
North Korea
On June 25, 1950, North Korea invaded South Korea, because of the long-term conflicts between them.
Let's conquer them, for theNorth Korea, for the Communism!
President of America:Harry. S. Truman
I will order troops to help South Korea and call for U.N's help!
I have two goals:1. Defend South Korea from being conquered.2. Contain the spread of Communism.
Ya Lu River
We have to fight with Americans and protect North Korea!
But as American troops crossed the boundary and headed north toward the Yalu River, the border between North Korea and Communist China, the Chinese started to worry about protecting themselves from what they called “armed aggression against Chinese territory.”
Chinese Communist party leader:Mao Zedong
I must help my dear friends in North Korea, I want to improve China's prestige in the communist world by what he saw as freeing South Koreans from U.S. imperialist rule