The fighting in Korea was finally stopped last July on terms which had been proposed many months before. Eisenhower and his Secretary of State, John Foster Dulles, believed that the threat of the use of nuclear weapons achieved peace in Korea, caused the Chinese to accept terms very similar to those previously offered during the Truman Administration. They were wrong. Dulles promulgated Eisenhower's strategic doctrine, "Massive Retaliation", and military policy, the "New Look" to support the policy of containment. Eisenhower had a vision and the confidence of having led the largest invasion in history, of having defeated in combat the most powerful armies ever arrayed in battle. Army leadership did not embrace Eisenhower's "New Look". Eisenhower adopted a national security vision very different from that senior Army leaders believed was necessary. Army leaders tried to maintain the Army's most fundamental cultural belief that man was the dominant instrument on the battlefield.