Answer:
Many died of diseases brought by the Europeans. This was the main impact of these voyages in the very short term. Later, Columbus's voyages led to the domination of the area from Mexico south to Peru by the Spanish. This resulted in the destruction of the major native civilizations like the Incas and the Aztecs.
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It gave them the right to fight for the sates of kansas and nebraska because if the won there would be more slave states than free.
Answer:
Sectionalism is the belief that a person's region was superior to other sections of the country. The most sectional tension was between the North and South, but the West was also developing an identity of its own and was willing to side with either of the other sections if it would help them grow.
19th-century imperialism was more focused on controlling a territory's economy than colonizing it. (APEX)