In attempt of taking control over all of Korea, both sides had put in much effort.
NATO became an alliance working for the U.S. When North Korea invaded the South, America sponsored a "police action"- a war in all but name- under the U.S. The Department of State also added onto America's strategies and contributed troops from 16 countries to the war. They also worked side by side with the South Korean President Lee Seungman to protect its democracy further in depth.
As for the communist party, China took North Korea's side and provided them with troops and weapons. Russia had also took their side and pitched in to help them. Basically all of the countries that were under communism sided with North Korea and provided them with military ideas, bombs, weapons, troops, and what not.
NATO became an alliance working for the U.S. When North Korea invaded the South, America sponsored a "police action"- a war in all but name- under the U.S. The Department of State also added onto America's strategies and contributed troops from 16 countries to the war. They also worked side by side with the South Korean President Lee Seungman to protect its democracy further in depth.
As for the communist party, China took North Korea's side and provided them with troops and weapons. Russia had also took their side and pitched in to help them. Basically all of the countries that were under communism sided with North Korea and provided them with military ideas, bombs, weapons, troops, and what not.