Which of the following best explains why the Colorado militia launched a campaign against American Indians in the 1860s? The American Indians had killed about 200 troops in the bloody Battle of Little Bighorn. White settlers believed that the American Indians were planning an uprising in the territory. The American Indians had begun to engage in Ghost Dance rituals that frightened settlers. White settlers believed that the American Indians would not honor the Treaty of Fort Laramie.

White settlers believed that the American Indians were planning an uprising in the territory.

Explanation:

In 1851 the American Government signed the Treaty of Fort Laramie with various Indian Nations by which it recognized in a large swat of territory to the West of the USA in territories spanning Wyoming, Nebraska and Colorado.

Gold was discovered in Colorado however and the Government then faced increased pressure to reduce Indian land so that mining could be more effectively done.

In 1861 the Treaty of Fort Wise was signed that saw the Indian lands reduced. Some Indian people however argued that the Treaty was not fair and that they did not all agree to it.

After some raids by some Indian groups, reprisals by the Government and misunderstandings, the Colorado Militia launched a campaign against the Natives as they believed that the groups who did not agree to the Treaty of Fort Wise were planning an uprising.

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