_Battle of Antietam_ (September 17).--Lee, perceiving his mistake, fell back across Antietam (An-te'-tam) Creek and hurried off couriers to hasten the return of his scattered corps. Fortunately for him, McClellan delayed his attack a day, and in the meantime Jackson had returned. At early dawn, Hooker fell upon the Confederate left, while Burnside, as soon as affairs looked favorable there, was to carry the bridge and attack their right. The Union army was over eighty thousand strong, and the Confederate but half that number. The Union advance was impetuous, but the Confederate defence was no less obstinate. Hooker was wounded, and his corps swept from the field. Both sides were reinforced. Burnside advanced, but too late to relieve the pressure on the Union right. Night ended this bloody fight. The morning found neither commander ready to assail his opponent. That night, Lee retired unmolested across the Potomac. [Footnote: During this invasion the Confederate soldiers had endured every privation; one-half were in rags, and thousands barefooted had marked their path with crimson. Yet shoeless, hatless, and ragged, they had marched and fought with a heroism like that of the Revolutionary times. But they met their equals at Antietam. Jackson's and Hooker's men fought until both sides were nearly exterminated, and when the broken fragments fell back, the windrows of dead showed where their ranks had stood.] Six weeks after, the Union army crossed into Virginia. _The Effect_ of this indecisive battle was that of a Union victory. The North was saved from invasion, and Washington from any danger of attack. Lincoln now determined to issue the Emancipation Proclamation, declaring freedom to all the slaves in the seceded States. [Footnote: Lincoln prepared the original draft in the July preceding, when the Union forces were in the midst of reverses. Carpenter repeats President Lincoln's words thus: "I put the draft of the proclamation aside, waiting for a victory. Well, the next news we had was of Pope's disaster at Bull Run. Things looked darker than ever. Finally came the week of the battle of Antietam. I determined to wait no longer. The news came, I think, on Wednesday, that the advantage was on our side. I was then staying at the Soldier's Home. Here I finished writing the second draft of the proclamation; came up on Saturday; called the Cabinet together to hear it, and it was published the following Monday. _I made a solemn vow before God, that if General Lee was driven back from Maryland I would crown the result by the declaration of freedom to the slaves._"]