The Battle of the Wilderness, together with Spottsylvania, is thought to be more destructive to the Federal forces than both Antietam and Gettysburg combined.
On Lee's sudden departure from Gettysburg there were many stragglers left behind, who were taken prisoners by the Federals. Some of them were not aware that the army had gone; others, on account of slight wounds and sickness, were not able to keep up with the army.
Lee succeeded in crossing the Potomac above Harper's Ferry about the middle of July with but little opposition from the Federals, and led his army across the Rapidan, and there entrenched himself to dispute the Federals under General Meade, who had by this time succeeded in crossing the Potomac and was moving upon Culpeper Court House, at which place he concentrated his forces. There was but little fighting done during the remainder of the year, except an unsuccessful cavalry expedition under Kilpatrick, who sought to take Richmond by surprise.
During the early months of 1864 the authorities at Washington became discouraged with General Meade's management of the Army of the Potomac. They thought that he should have destroyed Lee's army on its retreat from Gettysburg; while it is now conceded that Meade's management was good, and that he did all that any general could have done under the circumstances. General Grant had come into great favor in the North on account of his successive victories in the West, and it was decided to give Grant command of all the Federal forces, with the rank of lieutenant-general. This high grade in command had been held only by Generals Washington and Scott, thus bringing together two great generals. One the idol of the North: the other of the South. Cæsar said he would rather be first man in a village in Gaul than second in Rome.
Grant found under his command in the Army of the Potomac 140,000 men.
Lee found under his command scarcely 60,000 men, but that spirit burned in the breast of his soldiers notwithstanding their defeat at Gettysburg and their loss of Vicksburg, that many hard battles would be fought before the heel of the invader should tread upon the streets of their cherished capital, Richmond.
Grant determined to move upon Richmond and by doing so began with the Wilderness a series of battles which are unequaled in history.
Grant's army was divided into three corps, commanded by Hancock, Warren and Sedgwick. Sheridan was in command of the cavalry. Burnside was in command of another division of the army, protecting the Orange and Alexandria railroad.
Lee's army consisted of three corps of infantry, commanded by Longstreet, Ewell and A. P. Hill, and the cavalry by Stuart. A notable fact in the organization of the Confederate army was the few changes made in commanders.
Early on the morning of May 4th Grant's army began crossing the Rapidan below Lee's entrenchments. This being anticipated by Lee, he at once prepared to set his own army in motion and throw himself across the path of his foe. Both armies were now near Chancellorsville, in a wilderness country, where a great battle had been fought the year before. This country was covered by underbrush and ragged foliage, with scrub pine, and dotted here and there with small clearings. This wilderness country was pierced by a few roads leading from the fords of the river. The Federals had advanced up these roads as far as the Wilderness Tavern, in which General Grant established his headquarters.