Answer:
America used the Military.
Step-by-step explanation:
Here's America's Foreign Policy to help you understand: Military, Foreign Aid, and Treaties. As you can see above, the U.S. used the military to deal with a foreign country, as the american foreign policy states they should use only if absolutely necessary. As North Korea was trying to take over another country (South Korea) at the time, The U.N. (United Nations) immediately sent in over 20 countries with 90% of their military in, as taking over other countries is genuinely one of the greatest offenses in the world today.