Question refers to the excerpts below.

"that on the first day of january, in the year of our lord one thousand eight hundred and sixty-three, all persons held as slaves within any state or designated part of a state, the people whereof shall then be in rebellion against the united states, shall be then, thenceforward, and forever free."—from the emancipation proclamation, 1863

"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."—from the 13th amendment to the united states constitution, 1865

what role did these documents play in the civil war?

the emancipation proclamation forced african americans to enlist in the union army, but the 13th amendment rescinded the order.

the emancipation proclamation freed all slaves in theory, but the 13th amendment was needed before abolition could be enforced.

the emancipation proclamation changed the purpose of the war to abolishing slavery, and the ratification of the 13th amendment accomplished that goal.

the emancipation proclamation led to southern secession, and the states that seceded had to accept the 13th amendment before rejoining the union.