What was NATOs role in the Korean War?
Actually, NATO (The North Atlantic Treaty Organization) came into being on April 4, 1949, so it did exist during the Korean War. NATO was an organization designed to provide mutual assistance in case of war in the areas around the North Atlantic (North America and Europe), so it didn’t play any part in the Korean War. Some of the NATO members did participate in the Korean War, just not under the auspices of NATO.