Events of War War began when communist North Korea invaded South Korea in 1950, capturing the capital, Seoul War began when communist North Korea invaded South Korea in 1950, capturing the capital, Seoul South Korea asks UN to intervene South Korea asks UN to intervene UN Security Council voted to aid South Korea UN Security Council voted to aid South Korea 15 countries participated under the leadership of MacArthur 15 countries participated under the leadership of MacArthur United States led the peacekeeping forces United States led the peacekeeping forces 20 other nations eventually became involved in the war 20 other nations eventually became involved in the war Koreans saw it primarily as a civil war Koreans saw it primarily as a civil war
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