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Manufacturing, production and efficiency had increased through necessity during the Great War. America had emerged as a world industrial leader and the US economy was booming, profits were increasing which led to the period in American history called the Roaring Twenties with a massive rise in consumerism for the wealthy.
Before Gettysburg, most major Civil War battles in the East
were won by the Union military.involved General Robert E. Lee.were fought on Confederate soil.<span>involved General Ulysses S. Grant.</span>
Answer: the Scientific Revolution.
Explanation:Hope this helps