The document provides background information on the origins and early stages of the Korean War. It explains that after World War 2, Korea was divided along the 38th parallel, with the Soviet Union occupying the north and the US occupying the south. Both sides established governments of their ideology in their respective zones. Tensions rose as the Cold War escalated, and in June 1950, North Korea invaded South Korea, prompting the UN to authorize countries like the US to provide military support for South Korea. The initial North Korean invasion was successful in pushing South Korean forces back, but a US-led counterattack reversed these gains.