The specific reasons are as follows:
First, the root cause of the Cold War between the United States and the Soviet Union is the difference in fundamental interests and national forms. If the United States wants to occupy Japanese territory, it will definitely have a certain impact on Asia, and then the United States will have the ambition to be the world's number one superpower. It is likely that after the occupation of Japan, South Korea and North Korea will follow closely, and then the Soviet Union at that time. Therefore, the relationship between the Soviet Union and the countries that the United States wanted to occupy at that time was cold, and the American ambition also posed a big threat to the Soviet Union and damaged its long-term interests.
Second, after World War II, the Soviet Union and the United States were two superpowers, and the Cold War restored each other's strength. If we fight again, both countries will pay a great price. Although World War II broke the original world pattern, it also had a great impact on people's livelihood, economy and industrial development at that time. Everyone makes a living by time, raises interest, and kills so many people. It takes time to restore military manpower.
Third, at that time, the United States mainly dragged down the Soviet Union by procrastination, and at the same time strengthened its own power to make a living and raise interest. At that time, the western capitalist countries dominated by the United States and the Asian socialist countries headed by the Soviet Union were actually antagonistic roles in economy and culture. At that time, because of industrial development, the United States sold weapons in the war and continued to develop industry. The temporary truce gave the United States a chance to breathe, and then earned money from all countries in the world by selling arms. The Soviet Union was dragged down step by step because its technology was not strong enough, leading to its final disintegration.
The official symbol of the Cold War between the United States and the Soviet Union is the introduction of Truman Doctrine, which is a key historical event in the confrontation between the United States and the Soviet Union. Personal opinion, for reference only, hope to adopt ~