It was a difficult matter for Lincoln to decide upon a new general to command the Army of the Potomac. He made choice of Ambrose E. Burnside, the next in rank,--a man of pleasing address and a gallant soldier, but not of sufficient abilities for the task imposed upon him. The result was the greatest military blunder of the whole war. With the idea of advancing directly upon Richmond through Fredericksburg, Burnside made the sad error of attacking equal forces strongly intrenched on the Fredericksburg Heights, while he advanced from the valley of the Rappahannock below, crossing the river under a plunging fire, and attacking the enemy on the hill. It was a dismal slaughter, but Burnside magnanimously took the whole blame upon himself, and was not disgraced, although removed from his command. He did good service afterwards as a corps-commander.
It was soon after Burnside's unfortunate failure at Fredericksburg, perhaps the gloomiest period of the war, when military reverses saddened the whole North, and dissensions in the cabinet itself added to the embarrassments of the President, that Lincoln performed the most momentous act of his life, and probably the most important act of the whole war, in his final proclamation emancipating the slaves, and utilizing them in the Union service, as a military necessity.
Ever since the beginning of hostilities had this act been urged upon the President by the antislavery men of the North,--a body growing more intense and larger in numbers as the war advanced. But Lincoln remained steady to his original purpose of saving the Union,---whether with or without slavery. Naturally, and always opposed to slavery, he did not believe that he had any right to indulge his private feeling in violation of the Constitutional limitations of his civil power, unless, as he said, "measures otherwise unconstitutional might become lawful by becoming indispensable to the preservation of the Constitution through the preservation of the nation."
Thus when in 1861 Frémont in Missouri proclaimed emancipation to the slaves of persistent rebels, although this was hailed with delight by vast numbers at the North, the President countermanded it as not yet an indispensable necessity. In March, 1862, he approved Acts of Congress legalizing General B.F. Butler's shrewd device of declaring all slaves of rebels in arms as "contraband of war," and thus, when they came within the army lines, to be freed and used by the Northern armies. In March, May, and July, 1862, he made earnest appeals to the Border States to favor compensated emancipation, because he foresaw that military emancipation would become necessary before long. When Lee was in Maryland and Pennsylvania, he felt that the time had arrived, and awaited only some marked military success, so that the measure should seem a mightier blow to the rebels and not a cry for help. And this was a necessary condition, for, while hundreds of thousands of Democrats had joined the armies and had become Republicans for the war,--in fact, all the best generals and a large proportion of the soldiers of the North had been Democrats before the flag was fired on,--yet the Democratic politicians of the proslavery type were still alive and active throughout the North, doing all they could to discredit the national cause, and hinder the government; and Lincoln intuitively knew that this act must commend itself to the great mass of the Northern people, or it would be a colossal blunder.
Therefore, when Lee had been driven back, on September 22, 1862, the President issued a preliminary proclamation, stating that he should again recommend Congress to favor an Act tendering pecuniary aid to slaveholders in States not in rebellion, who would adopt immediate or gradual abolishment of slavery within their limits; but that on the first day of January, 1863, "all persons held as slaves within any State, or designated part of a State, the people whereof shall be in rebellion against the United States, shall be thenceforward and forever free." And accordingly,--in spite of Burnside's dreadful disaster before Fredericksburg on December 13, unfavorable results in the fall elections throughout the North, much criticism of his course in the newly-assembled Congress, and the unpopular necessity of more men and more money to be drawn from the loyal States,--on January 1, 1863, the courageous leader sent forth his final and peremptory Decree of Emancipation. He issued it, "by virtue of the power in me vested as commander-in-chief of the army and navy of the United States in time of actual armed rebellion against the authority and government of the United States, and as a fit and necessary war-measure for suppressing said rebellion."
Of course such an edict would have no immediate force in the remoter States controlled by the Confederate government, nor at the time did it produce any remarkable sensation except to arouse bitter animadversion at the North and renewed desperation of effort at the South; but it immediately began to reduce the workers on intrenchments and fortifications along the Confederate front and to increase those of the Federal forces, while soon also providing actual troops for the Union armies; and, since it was subsequently indorsed by all the States, through an amendment to the Constitution by which slavery was forever prohibited in the States and Territories of the United States, and in view of its immense consequences, the Emancipation Proclamation of Lincoln must be regarded as perhaps the culminating event in the war. It was his own act; and he accepted all the responsibilities. The abolition of slavery is therefore forever identified with the administration of Lincoln.
In the early part of 1863 Lincoln relieved Burnside of his command, and appointed General Joseph Hooker to succeed him. This officer had distinguished himself as a brilliant tactician; he was known as "fighting Joe;" but he was rash. He made a bold and successful march, crossed the Rappahannock and Rapidan rivers and advanced upon the enemy, but early in May, 1863, was defeated at Chancellorsville, in one of the bloodiest battles of the war. The Confederates were now exceedingly elated; and Lee, with a largely increased army of ninety thousand splendid fighting men, resolved on invading Pennsylvania in force. Evading Hooker, he passed through the Shenandoah Valley, and about the middle of June was in Pennsylvania before the Union forces could be gathered to oppose him. He took York and Carlisle and threatened Harrisburg. The invasion filled the North with dismay. Hooker, feeling his incompetency, and on bad terms with Halleck, the general-in-chief, asked to be relieved, and his request was at once granted.
General George C. Meade was appointed his successor on June 28. Striking due north with all speed, ably supported by a remarkable group of corps-commanders and the veteran Army of the Potomac handsomely reinforced and keenly eager to fight, Meade brought Lee to bay near the village of Gettysburg, and after three days of terrific fighting, in which the losses of the two armies aggregated over forty-five thousand men, on the 3d of July he defeated Lee's army and turned it rapidly southward. This was the most decisive battle of the war, and the most bloody, finally lost by Lee through his making the same mistake that Burnside did at Fredericksburg, in attacking equal forces intrenched on a hill. Nothing was left to Lee but retreat across the Potomac, and Meade--an able but not a great captain--made the mistake that McClellan had made at Antietam in not following up his advantage, but allowing Lee to escape into Virginia.
To cap the climax of Union success, on the 4th of July General Ulysses S. Grant, who had been operating against Vicksburg on the Mississippi during four months, captured that city, with thirty-two thousand prisoners, and a few days later Port Hudson with its garrison fell into his hands. The signal combination of victories filled the North with enthusiasm and the President with profoundest gratitude. It is true, Meade's failure to follow and capture Lee was a bitter disappointment to Lincoln. The Confederate commander might have been compelled to surrender to a flushed and conquering army a third larger than his own, had Meade pursued and attacked him, and the war might perhaps virtually have ended. Yet Lee's army was by no means routed, and was in dangerous mood, while Meade's losses had been really larger than his; so that the Federal general's caution does not lack military defenders. Nevertheless, he evidently was not the man that had been sought for.
More than two years had now elapsed since the Army of the Potomac had been organized by McClellan, and yet it was no nearer the end which the President, the war minister, the cabinet, and the generals had in view,--the capture of Richmond. Thus far, more than one hundred thousand men had been lost in the contest which the politicians had supposed was to be so brief. Not a single general had arisen at the East equal to the occasion. Only a few of the generals had seen important military service before the war, and not one had evinced remarkable abilities, although many had distinguished themselves for bravery and capacity to manage well an army corps. Each army commander had failed when great responsibilities had been imposed upon him. Not one came up to popular expectation. The great soldier must be "born" as well as "made."