Which primary source document could a historian understand why the civil war started? a) a map of the 1860 presidential election results b) a map showing where the first battles started c) an editorial from the charleston mercury in 1860 d) an essay that lists several possible causes

D) an essay that lists several possible causes

this would obviously be helpful when trying to find out what caused it, considering it contains a list of possible reasons

answer: in october 1962, an american u-2 spy plane secretly photographed nuclear missile sites being built by the soviet union on the island of cuba. president kennedy did not want the soviet union and cuba to know that he had discovered the missiles. he met in secret with his advisors for several days to discuss the problem.

explanation:

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.