Conflict between settlers and American Indians occurred after

From the Native Americans point of view, the conflict was usually caused due to "invasion" of the European settlers. This is because the European settlers usually moved onto the Native American land without payment or permission.

Explanation:

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the answer is b: an economic crisis throughout the country.

the emancipation proclamation was the aim of the war change to include the freeing of slaves in addition to preserving the union. the 13th amendment, which abolished slavery in the u.s. was passed on december 6th 1865.

as promised, lincoln waited to unveil the proclamation until he could do so with success from the union military advance. on september 22nd 1862, after a victory at antietam, he publicly announced a preliminary emancipation proclamation, declaring all slaves free in the rebellious states as of january 1st 1863.