The Korean War was the first major armed conflict in the Cold war between both superpowers USA and USSR. The United States of America and its, mostly NATO, allies were supporting South Korea and the North Korean army was heavily supported by their Socialist Brother States China and Soviet Union. Estimates vary, but at least two million Korean civilians, up to 1.5m communist forces, and around 30,000 US, 400,000 South Korean are believed to have died during the conflict.
It marked the beginning of an ongoing conflict two deeply disrupted nations that used to be one country. Even after 65 years of armistice no actual peace contract has been signed and the border is still bristled with mines and under constant military supervision. The consequences of this war are still vivid and shape the relationship between the north and the south of Korea.