Under the influence of imperialism, when the Second World War broke out, the US military, whether it was military spending, or even the number was even more than Japan at the time.
With the outbreak of the Pearl Harbor incident, industrial production capacity and war potential ranked first, and it began explosive growth.
In 1940, the US defense expenditure was only $190 million. By the end of World War II, its defense spending was as high as $5.98 billion!
