Because he had to demonstrate that the Union had the military power to successfully match the Confederacy not only in the western fronts but also in the eastern theater of operation, where the Federals had been almost always beaten.
He was given this opportunity thanks to the decisive strategic victory at the Battle of Antietam (though from a tactical point of view, the encounter must be considered a tiny one).
So the event led to the release of the Emancipation Proclamation, a measure of war which strengthened the Union's war effort, giving to the Blacks the chance to enlist in the US Army and fight for their freedom.
Because otherwise it would have looked like a desperate measure, and would not have carried conviction with free nations abroad, to whom it was chiefly addressed.
The Emancipation Proclamation, where Lincoln declared that Southern slaves would be 'thenceforward and forever free'.
The Emancipation Proclamation was signed by Abraham Lincoln on January 1, 1863 though the 1st executive order was signed by President Lincoln on September 22, 1862
The Emancipation Proclamation
President Lincoln signed the Emancipation Proclaimation in 1862. It was enforced by Union troops during the Civil War.
President Lincoln emancipated the slaves withe the emancipation proclamation and he proclaimed it on September 22 1862, but he said it was supposed to go into action an new years 1863.
Abraham Lincoln wrote the Emancipation Proclamation sometime in June of 1862. He read a draft of the Proclamation in July of 1862, to his cabinet members.
President Lincoln issued the preliminary Emancipation Proclamation.
Lincoln issued the Emancipation Proclamation freeing all slaves in states that were in rebellion against the Union. The proclamation was issued in the Fall of 1862 and took effect on January 1, 1863.
To kill the jews
Abraham Lincoln wrote the Emancipation Proclamation sometime in June of 1862. He read a draft of the Proclamation in July of 1862, to his cabinet members.
september 22 1862
September 22nd, 1862, when he signed the Emancipation Proclamation, and later this was built on by another order on January 1st, 1863. After these were signed, a couple of years passed and people quickly began to free slaves. Sometime in July of 1865, all the slaves in America had finally been set free.