 On July 22, he wrote a first draft of the Emancipation Proclamation that freed the slaves in states in rebellion.After he showed his Cabinet the document, slight alterations were made in the wording.Lincoln decided that the defeat of the Confederate invasion of the North at Sharpsburg was enough of a battlefield victory to enable him to release the preliminary Emancipation Proclamation that gave the rebels 100 days to return to the Union or the actual proclamation would be issued.