Video+questions+on+Korean+War

1) What did Truman pledge upon receiving news of North Korea's attack? 2) What did the U.S. declare at the U.N? 3) List some of the countries involved besides the U.S. 4) Describe and explain the significance of the three key battle segments I highlighted
 * 8th army drives north
 * Incheon landing
 * March from Incheon to Seoul