North Korea became a communist nation while South Korea stayed as a democratic nation.
North Korea made a surprise attack on South Korea. The United States sent troops over to Japan to back up the South Koreans.
The United States fully commits to helping the South Koreans defend themselves from the North Korean attacks.
UN troops land in South Korea and push the North Korean forces towards china.
The Chinese army joins the war and pushes the UN troops back to the now existing border between North and South Korea.
North and South Korea signs a treaty and ends the war in a stalemate or tie.