Basically It caused alot of new weapon/tec to be created
One famously known : The Atomic Bomb that hit japan hard
Aircrafts were made
U boats
Improved Radars
To be honest i would go and look for them but this is what came on top of my head
Also Japan was changed after the war
Russia went through some tough times with the soviet union
The America Felt a nice Push in the economy
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