Steve (as 41oo) wrote:By mid 1945, Japan was finished.
Yes, but that did not mean they were ready to accept our surrender terms.
While we were going to win the war, how we were going to win was a different question.
Had it required invasion and subjugation of the entire Japanese homeland to secure capitulation, casualty estimates for US soldiers ranged from a quarter million dead and three quarters of a million wounded, to half a million dead and millions wounded.
Even if they would have capitulated upon our gaining a foothold on the islands, that still would have required the equivalent of a D-day invasion (or two) on our part.
We were desperate to get them to accept our surrender terms before invasion was necessary.
Steve (as 41oo) wrote:The problem for the US was two fold:
1. Keeping Japan in the war long enough to enable the atomic bombing experiments to take place "legitimately".
Had that been a US objective, it wouldn't have been a problem, as Japan was more than willing to not accept our surrender terms.
Unfortunately, our goal was the opposite, getting Japan to accept our terms as quickly as possible. And they were much less obliging at doing that.
Steve (as 41oo) wrote:2. Finding and preserving city targets undamanged from conventional bombing to enable a true measure of the atom bomb's destructive power to take place.
That was not a problem. We had already preserved three targets already for just such purposes (Hiroshima, Kokura Arsenal, and Niigata).
In addition, there were 15 or so cities that were not able to be targeted reliably with radar guidance, meaning that they were escaping our bombing raids unscathed. One of these was Nagasaki.