Skulls Remaining On The Field And Trees Destroyed At The Battle Of The Wilderness, 1864
Although the Wilderness is usually described as a draw, it could be called a tactical Confederate victory, but a strategic victory for the Union army. Lee inflicted heavy numerical casualties, but as a percentage of Grant’s forces they were smaller than the percentage of casualties suffered by Lee’s smaller army. And, unlike Grant, Lee had very little opportunity to replenish his losses.
Understanding this disparity, part of Grant’s strategy was to grind down the Confederate army by waging a war of attrition. The only way that Lee could escape from the trap that Grant had set was to destroy the Army of the Potomac while he still had sufficient force to do so, but Grant was too skilled to allow that to happen. Thus, the Overland Campaign, initiated by the crossing of the Rappahannock, and opening with this battle, set in motion the eventual destruction of the Army of Northern Virginia.
Hattaway, Herman, and Archer Jones. How the North Won: A Military History of the Civil War. Urbana: University of Illinois Press, 1983.