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they acted as a barrier to further settlement to the west
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Answer:
The answer is The Union blocked trade and transportation routes.
Explanation:
It i because the Union armies blocked the trade routes, both Land and Maritime.
Union, having more population, more resources and a better economy was able to raise a powerful fleet of their own. In fact one of the first things the Union president Abraham Lincoln did was to blockade the coastal areas of the South to take down their economy.
Considering the map above, one can conclude about the Native Americans' journey to the reservation is that "s<span>ome Native Americans traveled by boat at least part of the way". I hope this answer helps. Have a great day!</span>
Answer: The water provided food and offered a transportation route