How did World War I and World War II help the United States economically and with regard to its role in the in?

During WWI and WWII America lost many soldiers. They needed to make weapons in order to handle the enemy forces. Of course, these weapons cost a lot. they bought more than 1 million weapons and bombs. America got bombed at the end of the world war. They had to rebuilt many places. if we add all of these things up, it is going to cost approximately more than $1,000,000,000.

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