Answer:
Emancipation proclamation
Explanation:
This officially changed the focus of the war on emancipation black slaves in confederate states instead of preserving the state of the union.
Thanks for not giving me brainliest -_-
At the beginning of 1863, Abraham Lincoln issued the Emancipation Proclamation, which freed all slaves in areas under rebellion. This changed the war from one in which the North fought to preserve the Union to one in which it fought to free enslaved African Americans.
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