"I understand General Halleck has sent you a letter of which this is a copy. I approve this letter. I deplore the want of concurrence with you in opinion by your general officers, but I do not see the remedy. Be cautious, and do not understand that the government or country is driving you. I do not yet see how I could profit by changing the command of the Army of the Potomac; and if I did, I should not wish to do it by accepting the resignation of your commission."
Once more Burnside issued orders against which his generals protested, and which a storm turned into the fruitless and impossible "mud march" before he reached the intended crossings of the Rappahannock. Finally, on January 23, Burnside presented to the President the alternative of either approving an order dismissing about a dozen generals, or accepting his own resignation, and Mr. Lincoln once more had before him the difficult task of finding a new commander for the Army of the Potomac. On January 25, 1863, the President relieved Burnside and assigned Major-General Joseph Hooker to duty as his successor; and in explanation of his action wrote him the following characteristic letter:
"I have placed you at the head of the Army of the Potomac. Of course I have done this upon what appear to me to be sufficient reasons, and yet I think it best for you to know that there are some things in regard to which I am not quite satisfied with you. I believe you to be a brave and skilful soldier, which, of course, I like. I also believe you do not mix politics with your profession, in which you are right. You have confidence in yourself, which is a valuable, if not an indispensable quality. You are ambitious, which, within reasonable bounds, does good rather than harm; but I think that during General Burnside's command of the army you have taken counsel of your ambition and thwarted him as much as you could, in which you did a great wrong to the country, and to a most meritorious and honorable brother officer. I have heard, in such a way as to believe it, of your recently saying that both the army and the government needed a dictator. Of course it was not for this, but in spite of it, that I have given you the command. Only those generals who gain successes can set up dictators. What I now ask of you is military success, and I will risk the dictatorship. The government will support you to the utmost of its ability, which is neither more nor less than it has done and will do for all commanders. I much fear that the spirit which you have aided to infuse into the army, of criticizing their commander and withholding confidence from him, will now turn upon you. I shall assist you as far as I can to put it down. Neither you nor Napoleon, if he were alive again, could get any good out of an army while such a spirit prevails in it; and now beware of rashness. Beware of rashness, but with energy and sleepless vigilance go forward and give us victories."
Perhaps the most remarkable thing in this letter is the evidence it gives how completely the genius of President Lincoln had by this, the middle of his presidential term, risen to the full height of his great national duties and responsibilities. From beginning to end it speaks the language and breathes the spirit of the great ruler, secure in popular confidence and official authority, equal to the great emergencies that successively rose before him. Upon General Hooker its courteous praise and frank rebuke, its generous trust and distinct note of fatherly warning, made a profound impression. He strove worthily to redeem his past indiscretions by devoting himself with great zeal and energy to improving the discipline and morale of his army, recalling its absentees, and restoring its spirit by increased drill and renewed activity. He kept the President well informed of what he was doing, and early in April submitted a plan of campaign on which Mr. Lincoln indorsed, on the eleventh of that month:
"My opinion is that just now, with the enemy directly ahead of us, there is no eligible route for us into Richmond; and consequently a question of preference between the Rappahannock route and the James River route is a contest about nothing. Hence, our prime object is the enemy's army in front of us, and is not with or about Richmond at all, unless it be incidental to the main object."
Having raised his effective force to about one hundred and thirty thousand men, and learning that Lee's army was weakened by detachments to perhaps half that number, Hooker, near the end of the month, prepared and executed a bold movement which for a while was attended with encouraging progress. Sending General Sedgwick with three army corps to make a strong demonstration and crossing below Fredericksburg, Hooker with his remaining four corps made a somewhat long and circuitous march by which he crossed both the Rappahannock and the Rapidan above the town without serious opposition, and on the evening of April 30 had his four corps at Chancellorsville, south of the Rappahannock, from whence he could advance against the rear of the enemy. But his advantage of position was neutralized by the difficulties of the ground. He was in the dense and tangled forest known as the Wilderness, and the decision and energy of his brilliant and successful advance were suddenly succeeded by a spirit of hesitation and delay in which the evident and acknowledged chances of victory were gradually lost. The enemy found time to rally from his surprise and astonishment, to gather a strong line of defense, and finally, to organize a counter flank movement under Stonewall Jackson, which fell upon the rear of the Union right and created a panic in the Eleventh Corps. Sedgwick's force had crossed below and taken Fredericksburg; but the divided Union army could not effect a junction; and the fighting from May 1 to May 4 finally ended by the withdrawal of both sections of the Union army north of the Rappahannock. The losses suffered by the Union and the Confederate forces were about equal, but the prestige of another brilliant victory fell to General Lee, seriously balanced, however, by the death of Stonewall Jackson, who was accidentally killed by the fire of his own men.
In addition to his evident very unusual diminution of vigor and will, Hooker had received a personal injury on the third, which for some hours rendered him incapable of command; and he said in his testimony before the Committee on the Conduct of the War:
"When I returned from Chancellorsville I felt that I had fought no battle; in fact, I had more men than I could use, and I fought no general battle for the reason that I could not get my men in position to do so probably not more than three or three and a half corps on the right were engaged in the fight."
Hooker's defeat at Chancellorsville had not been so great a disaster as that of Burnside at Fredericksburg; and while his influence was greatly impaired, his usefulness did not immediately cease. The President and the Secretary of War still had faith in him. The average opinion of his qualities has been tersely expressed by one of his critics, who wrote: "As an inferior he planned badly and fought well; as a chief he planned well and fought badly." The course of war soon changed, so that he was obliged to follow rather than permitted to lead the developments of a new campaign.
The brilliant victories gained by Lee inspired the Confederate authorities and leaders with a greatly exaggerated hope of the ultimate success of the rebellion. It was during the summer of 1863 that the Confederate armies reached, perhaps, their highest numerical strength and greatest degree of efficiency. Both the long dreamed of possibility of achieving Southern independence and the newly flushed military ardor of officers and men, elated by what seemed to them an unbroken record of successes on the Virginia battle-fields moved General Lee to the bold hazard of a second invasion of the North. Early in June, Hooker gave it as his opinion that Lee intended to move against Washington, and asked whether in that case he should attack the Confederate rear. To this Lincoln answered on the fifth of that month: