DMZ.1.history

Background of DMZ & Korean War.
Following statments were quoted from Wikipedia~

Later, in 1945, Harry S. Truman selected Acheson as the Undersecretary of
the United States Department of State; he retained this position working under
 Secretaries of State Edward Stettinius, Jr., James F. Byrnes, and George Marshall.
As late as 1946 Acheson sought détente with the Soviet Union. In 1946,
as chairman of a special committee to prepare a plan for the international
control of atomic energy, he wrote the Acheson–Lilienthal report.

At first Acheson was conciliatory towards Joseph Stalin.
The Soviet Union’s attempts at regional hegemony in Eastern Europe 
and in Turkey and Iran changed Acheson’s thinking. 
From this point forward, one historian writes, 
“Acheson was more than ‘present at the creation’ of the Cold War;
he was a primary architect.”^[11] 

Acheson often was acting secretary during the secretary’s frequent overseas trips,
and during this period he cemented a close relationship with President Truman.

Acheson devised the policy and wrote Truman’s 1947 request to Congress for aid to
Greece and Turkey, a speech which stressed the dangers of totalitarianism
(but did not name the Soviet Union) and marked the fundamental change
in American foreign policy that became known as the Truman Doctrine.
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Korean Peninsula was liverated on 15th of August, 1945.
But Korean Penissula was devided Comunist North and Democratic South.
Then 5 years later, 4AM, 25th of June, 1950,
Comunist North Korea invaded Democratic South Korea.
80 days later from the invasion, Comunist North Korea occupied whole of South Korea except Busan area.
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Commandar, United Nations Command, 5stars General, Douglas MacArthur had runned, carry out “the Battle of Incheon” on 15th of September, 1950 like a “Operation Overlord” “Operation Neptune” as a “Normandy landing” of World War II.