This is an excerpt from Presidential Proclamation 2914 made on December 16, 1950.
Whereas events in [Asia] and elsewhere constitute a grave threat to the peace of the world and imperil the efforts of the country and those of the United Nations to prevent aggression and armed conflict; and…. Whereas the increasing menace of the forces of communist aggression requires that the national defense of the United States be strengthened as speedily as possible: Now, therefore, I, Harry S. Truman, President of the United States of America, do proclaim the existence of a national emergency, which requires that the military, naval, air, and civilian defenses of this country be strengthened as speedily as possible to the end that we may be able to repel any and all threats against our national security and to fulfill our responsibilities in the efforts being made through the United Nations and otherwise to bring about lasting peace.
How did this proclamation impact the development of the Cold War?
It led to the reunification of Korea under a democratic government modeled after the United States.
It set the precedent for the United States engaging in military actions without formal declarations of war.
It set the precedent for the United States participating only in peacekeeping operations sanctioned by the United Nations.
It led to the United States and the Union of Soviet Socialist Republics (USSR) working together to help struggling nations in Asia.