Answer:
To unify the new nation
Explanation:
By providing the means to travel across the land in order to reach the new settlements of the West.
Human history and prehistory
Answer:
The war started mainly because of four aspects: Militarism, Alliances, Imperialism and Nationalism. This is because big armies become potential threats to other countries, other countries started forcing alliances in order to secure land.
Explanation:
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To keep either house of Congress from becoming too powerful. (Gradpoint)
