How did the emancipation proclamation lincoln preserve the union?

Lincoln Issues the Emancipation Proclamation

The proclamation exempted the border slave states and all or parts of three Confederate states controlled by the Union army on the grounds that these areas were not in rebellion against the United States.

Hope this helps if not sorry

hello,

  i would that it was because no matter how hard people worked everyone would be paid the same, witch it was a that the russian to rule.

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social status of early civilizations was based primarily on economic power.- true ( first choice)