The Emancipation Proclamation granted freedom to the slaves in the Confederate States, if the States did not return to the Union by January 1, 1863. Do to this proclamation, the slaves could be freed, but only if they won the war. However, in a way the Emancipation Proclamation changed the meaning and purpose of the war. The war was no longer just about preserving the Union, it was also about giving the slaves a chance to be free and live somewhat normal lives. Unfortunately, Britain and France lost their keenness for supporting the Confederacy. The Emancipation Proclamation changed the course of the war because slave will desire to fight for the north once they are liberated and England and France will no longer help the south in the war because they want slavery.
