Eli Whitney invented both the cotton gin and interchangable parts, both of which contributed to manufacturing in the United States at that time.
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I believe the answer is it committed the colonies to being independent.
When Russia entered WW1, they had mobilized about 1.5 million soldiers. At most, the Russians had 5 million soldiers fighting. They couldn't arm all of these soldiers though, because they only had about 4.6 million weapons.
