eli5: How Did Japan and America Go From Enemies to Allies So Quickly?

Question

I’m trying to wrap my head around how the USA and Japan shifted from being fierce enemies during World War II to becoming close allies in just a few decades. It seems like a huge turnaround in international relations from an American perspective. What happened and why this dramatic change?

In: Other

Answer 1

You utterly destroy one countries divine belief that they are superior by nuking not 1 but 2 cities for kicks. I mean we humbled the shit out of them and since that bore a long lasting alliance its been goochie from there.