What effect did the emancipation proclamation have on how the civil war progressed?

The Emancipation of Proclamation changed the meaning of what the civil war was about

Explanation:

The proclamation freed slaves and gave them permission to joined the Union which ended up being one of the main reasonons why the war became even a bigger conflict asthe South didnt want to free their slaves and the Union was fighting against slavery.

The Emancipation Proclamation was an executive order issued by Abraham Lincoln on January 1, 1863. It proclaimed the freedom of slaves in the ten Confederate states still in rebellion. It also decreed that freed slaves could be enlisted in the Union Army, thereby increasing the Union's available manpower.