Answer:
the cotton gin invented by eli whitney
Explanation:
The main argument against the border states leaving the Union during this time was of course that it was treason and punishable by death. Arguments for staying in the Union also included the fact that there were far more men and resources in the north.
Answer:
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The Roosevelt Corollary built on the document the Monroe Doctrine
Answer:
Just as it opened the markets of the west coast and Asia to the east, it brought products of eastern industry to the growing populace beyond the Mississippi. The railroad ensured a production boom, as industry mined the vast resources of the middle and western continent for use in production.
Explanation: