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The promise of the Emancipation Proclamation was to free all persons held as slaves in the United States.

What was the Emancipation Proclamation?

The Emancipation Proclamation was presidential act by President Abraham Lincoln on January 1, 1863 at the thick of the bloody civil war.

The Emancipation Proclamation declared  all persons to be free.

The Emancipation Proclamation became a key factor that helped the Union Army to win the Confederate Army with the support of blacks.

Thus, the promise of the Emancipation Proclamation freed all persons held as slaves in the United States, but the fulfilment could not be reached only with the Reconstruction.

Learn more about the Emancipation Proclamation at https://brainly.com/question/366638

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