US could not lost. Japan was running out of resources - steel, oil (in fact blocked access to resources was what pushed them to the war they could not win). Maybe war on Pacific would last a bit longer, probably it will cost more lives, but from the beginning it was lost for Japan.
That's why using atomic bomb had no real military justification, it was just a very powerful political demonstration and USA retaliation on Japanese people.
That's why using atomic bomb had no real military justification, it was just a very powerful political demonstration and USA retaliation on Japanese people.