The Korean War tested how far the United States was willing to go to stop the spread of communism around the world.
The battle in Korea went back and forth before finally settling at the truce line.
General Douglas MacArthur was relieved of his duties after his desagrement with President Truman.
At the end of World War 2, the East Asian country of Korea came under control of the United States and the Soviet Union.
By January 1951, the Communists had captured Seoul, South Korea's capital.
MacArthur argued that dropping atomic bombs on Chinese bases and supply lines would bring a quick victory, but Turman opposed MacArthur's plan.
MacArthur criticized the president, in a letter to a member of Congress.
After the letter MacArthur was removed by president.
The end of war just began in 1951, negotiators finally reached a cease-fire agreement in July 1953.
The United States had shown the Soviets that it was willing to use force to block the spread of communism.