Your question states: Why did the allies win World War 2? Let's get one option out the way, the correct answer would be wonder women. I believe that the correct answer would be of that they had <span>More troops. At that time, there economy was not that good. But, I bet, if </span> was there, they would have won alot faster. But your correct answer would be "more troops" because they had over 16.1 million troops. This would be the reason why that would be the correct answer.