it gave the right to free slaves
April 8th, 1864 December 6, 1865
http://wiki.answers.com/Q/What_did_the_13th_Amendment_do_to_change_the_constitution
slavery, this amendment forbids any type of slavery.
NovaNet: It Abolished Slavery
The 13th Amendment abolished slavery in the United States. It was ratified on December 6th 1865.