The United States of America
The president of the U.S was Harry S. Truman. The U.S had stronger military and better technology than Soviet As the Soviet Union support North Korean to annex South Korean,the U.S was the first county leaded in advising the commander-in-chief, the United States rushed the Korean issue to the United Nations Security Council in New York. Therefore, the U.S leaded the U.N soldiers involved the Korean War,and most of soldiers were form the U.S. After the war, the U.S is the most damaging allies of South Korea.