After the surrender of Germany in World War II, the European battlefield basically came to an end, on the contrary, in the Asian theater, Japan was still stubbornly resisting, claiming to "100 million jade pieces". Seeing that Japan's defeat was already assured, but it was still refusing to accept the Potsdam Proclamation and refusing to surrender, the United States made a move that was unexpected by all countries. 
On August 6, 1945, a U.S. bomber dropped an atomic bomb called "Little Boy" over Hiroshima, Japan. In an instant, the entire Hiroshima collapsed and was razed to the ground, killing and injuring more than 200,000 people. However, in the face of this bombing, Japan** still resolutely did not agree to accept the terms of surrender. So, three days later, the U.S. military dropped an atomic bomb called "Fat Man" on Nagasaki, Japan, causing hundreds of thousands of people in Nagasaki** and more than 60% of buildings were damaged. Seeing the countless casualties of its own people, the Japanese ** was angry but helpless, and in desperation, they could only accept the terms and surrender unconditionally. Some people say that we should be most grateful to the United States for the victory of the War of Resistance Against Japanese Aggression, and if it were not for their two atomic bombs, we still don't know how long Japan would have wanted to die and beg for nothing. 
But in fact, is the U.S. military really thinking about us and China? Faced with Japan's defeat assured, what was the purpose of their atomic bombing? As early as December 7, 1941, Japan planned a sneak attack to bomb Pearl Harbor, and the Pacific War broke out, and the United States, which originally wanted to stand by and watch, was forced to get involved, which is the famous Pearl Harbor incident. The Pearl Harbor incident caused at least 3,000 U.S. troops, and Roosevelt shouted bitterly: The people must remember this day of great shame! Overnight, more than 20 countries, including the Netherlands and Australia, declared war on Japan, and at this time, a full decade had passed since the September 18 incident. The cunning character of the Americans has never changed, and if it weren't for Japan's deliberate trouble, I believe they would still prefer to stand by and take the sheep by their side. However, since they have been forced to join the war, how can the United States easily let go of the little Japan that dragged them into the water? 
originally thought that it would be easy to defeat the Japanese army with their own strength, but the Japanese army's character of not being afraid of death deeply shocked them, such as human bombs, kamikaze special attack teams, etc., which made the US military taste all the hardships. As the battle line progressed, the United States suddenly discovered that during their war, the Soviet Union was accelerating its global expansion, and in order to contain the unforeseen from happening, the Americans did not hesitate to sacrifice China's interests in exchange for the Soviet Union's war against Japan. By this time, Japan's defeat had gradually emerged. Seeing that Japan is about to finish, the United States is excited at the same time, but also a little unwilling, and they are also worried that Japan will be carved up by other camps like Germany, and it just so happened that the first atomic bomb test was successfully exploded at this time. In order not to leave regrets, and in order to gain the right to speak in the international community, the United States decided to experiment with Japan again, and Truman even thought of a statement: to end the war at the lowest cost and as quickly as possible. So, after the two atomic bombs were dropped, Japan surrendered. Therefore, the greater reason why the United States dropped the atomic bomb was to retaliate against Japan, deter other countries, and of course, the most important thing is to gain more say in the world and become the real boss in the world.