How the tension on the Korean Peninsula was formed, today we will talk about how the United States in order to win the Soviet Union together against the Japanese army in the late World War II, Roosevelt avoided Churchill and privately discussed with Stalin, Roosevelt agreed to the South Thousand Islands Group and the use of the port of Dalian, China and the Manchurian Railway under the control of the Soviet Union, Stalin gladly accepted such a post-war division of power in East Asia.
However, as the war progressed, the Soviet Union immediately entered the Korean Peninsula after driving out the Japanese army in northeast China, and at this time the main forces of the American army in the Pacific region were attacking Okinawa, Japan, and they were exhausted, although Japan would soon be defeated, but at this time there was no extra strength to compete with the Soviet Union for the Korean Peninsula.
In order to avoid the Soviet Union's future use of the Korean Peninsula to threaten the interests of the US military in Japan, the cunning Americans racked their brains to draw this 38th parallel dividing line on the map, and divided Korea in two, and the Soviet Union at that time obviously did not think so long-term, and it was afraid that the Americans would not be so easy to agree to it if they wanted to swallow Korea alone.
The U.S.-Soviet deal split North Korea into two countries with completely opposite meanings, intolerable to each other, and many conflicts broke out, until now the two countries still maintain a state of war, and may break out again at any time.