During World War II, Japan's harm to China and southeast Asian countries is the most profound, even after more than 70 years have passed, we still can't forget, and Japan launched the Pacific War in the middle of World War II, which became the last straw that dragged him down, because the economic strength of the United States was far from what Japan could resist at that time, plus the United States itself was not troubled by war, and a large number of military materials could not only be used against Japan, but also to aid Various countries in Europe and Southeast Asia.
In fact, Japan has always been the most important opponent in Asia, the Soviet Union is the first among them, after all, the two great powers as early as the beginning of the twentieth century elaborate a series of wars, after the outbreak of World War II, the Soviet Union on the one hand to deal with German aggression, and on the other hand, is to guard against the Kwantung Army stationed in northeast China, at that time there have been rumors that Japan may send troops north, and Germany together from the north and south from the north and south of germany to attack Germany.
All this also disappeared completely from the outbreak of the Pacific War, after letting go of the Soviet Union, received military assistance from all over the world, successfully defeated Germany, and Japan also had to accept the tragic end of defeat in the Pacific theater, in fact, just before the war in Japan, there were many opposition voices in the country, that is, to launch a war against the United States, but Japan still did this, only because they found a problem when they looked at the globe.
But during the war of aggression against China, the United States interrupted the supply of Japanese military materials, which also made them have to think of other ways, and at that time, the area controlled by the Japanese army was only Southeast Asia, so the Japanese army could only launch operations against the United States, seize the United States military bases in Southeast Asia and important resource supply areas, but also to coerce the United States, so that they can get a large number of military resources, to put it bluntly, this is a risk-taking strategy, in recent history they have been doing so. They also defeated the late Qing government, which seemed to be more powerful than them, in the Battle of Jia-Wu.
There is no doubt that this strategy was successful at the beginning, the Japanese army occupied the military resource bases in Southeast Asia, obtained replenishment, and even cut off the transportation hub of Western countries to aid China, the Burma Road, but the strong economic strength of the United States, they are not the Chinese late Qing government, do not care about such losses, and the speed at which the United States announced its participation in the war was also unexpected by the Japanese army, so that Japan's collapse in the Pacific was also an obvious end.