Final answer:
The Emancipation Proclamation only freed slaves in already conquered rebel areas.
Step-by-step explanation:
The Emancipation Proclamation, issued by President Abraham Lincoln during the American Civil War, did not free all slaves. Instead, it only freed slaves in rebel areas already conquered by the union. The proclamation was not applicable to the border slave states that had remained loyal to the Union, nor did it apply to the rebel areas that were still under Confederate control.
Learn more about The impact and scope of the Emancipation Proclamation