Of course it wasn't necessary, strictly speaking. An invasion may have worked (at probably an even greater loss of life). Waiting things out a while longer mi

Of course it wasn't necessary, strictly speaking. An invasion may have worked (at probably an even greater loss of life). Waiting things out a while longer might have worked as well, but again may have resulted in more loss of life due to the ongoing blockade. What we do know as a fact - which seems to be glossed over by a lot of people - is that the Emperor specifically mentioned the bomb in his surrender speech as one of the reasons why they were surrendering. https://en.wikipedia.org/wiki/Jewel_Voice_Broadcast https://en.wikipedia.org/wiki/Jewel_Voice_Broadcast