One of the causes was that the US government wanted the black hills for gold, but the Sioux refused to give up the black hills causing conflict.
Government should serve the people
Because maybe bad things will happen or if there is a war
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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