13th amendment

The 13th Amendment was the amendment that really abolished slavery within the United States. Even though the Emancipation Proclamation had already been put into place nothing really changed until the 13th amendment came about.

AMENDMENT XIII

SECTION 1

Neither slavery nor involuntary servitude, except as a punishment for crime whereof the party shall have been duly convicted, shall exist within the United States, or any place subject to their jurisdiction.

SECTION 2

Congress shall have power to enforce this article by appropriate legislation.

The 13th amendment was passed by Congress on January 31 1865 and was ratified by all states on December 1 1865. The Emancipation Proclamation was implemented on January 1st 1863 when the civil war was entering it's 3rd year. The Emancipation Proclamation stated "All persons held as Slaves" "are, and henceforward shall be free." Although it did release some slaves, it was only in the rebellious states, meaning those who hadn't succeeded from the Union still could hold slaves. But the 13th amendment freed all slaves, no matter what part of the country they were in. 

Sources:
-Full Constitution
-Picture and more information of the 13th amendment 
-Date of ratification of the 13th amendment
-Information and further of the details of the Emancipation Proclamation