No, it didn't. In fact, the United States subtly threatened to use nuclear weapons in the conflict after Joseph Stalin's death and that brought Chinese negotiators and their North Korean puppets to the bargaining table. read more
The US did not surrender (actually the UN, but overwhelmingly US forces) in the Korean War. They beat the NKPA up within a few months and inflicted massive damage on the CCF that came in to ensure the territorial integrity of the DPRK. read more
US Enters the Korean Conflict (Originally published in Social Education, the Journal of the National Council for the Social Studies). Background While the end of World War II brought peace and prosperity to most Americans, it also created a heightened state of tension between the Soviet Union and the United States. read more