The Overland Campaign, also known as Grant's Overland Campaign and the Wilderness Campaign, was a series of battles fought in Virginia during May and June 1864, in the American Civil War. Lt. Gen. Ulysses S. Grant, general-in-chief of all Union armies, directed the actions of the Army of the Potomac, commanded by Maj. Gen. George G. Meade, and other forces against Confederate Gen. Robert E. Lee's Army of Northern Virginia. Although Grant suffered severe losses during the campaign, it was a strategic Union victory. It inflicted proportionately higher losses on Lee's army and maneuvered it into a siege at Richmond and Petersburg, Virginia, in just over eight weeks.

Crossing the Rapidan River on May 4, 1864, Grant sought to defeat Lee's army by quickly placing his forces between Lee and Richmond and inviting an open battle. Lee surprised Grant by attacking the larger Union army aggressively in the Battle of the Wilderness (May 5–7), resulting in heavy casualties on both sides. Unlike his predecessors in the Eastern Theater, however, Grant did not withdraw his army following this setback, but instead maneuvered to the southeast, resuming his attempt to interpose his forces between Lee and Richmond. Lee's army was able to get into position to block this movement. At the Battle of Spotsylvania Court House (May 8–21), Grant repeatedly attacked segments of the Confederate defensive line, hoping for a breakthrough, but the only results were again heavy losses for both sides.

Grant maneuvered again, meeting Lee at the North Anna River (Battle of North Anna, May 23–26). Here, Lee held clever defensive positions that provided an opportunity to defeat portions of Grant's army, but illness prevented Lee from attacking in time to trap Grant. The final major battle of the campaign was waged at Cold Harbor (May 31 – June 12), in which Grant gambled that Lee's army was exhausted and ordered a massive assault against strong defensive positions, resulting in disproportionately heavy Union casualties. Resorting to maneuver a final time, Grant surprised Lee by stealthily crossing the James River, threatening to capture the city of Petersburg, the loss of which would doom the Confederate capital. The resulting siege of Petersburg (June 1864 – March 1865) led to the eventual surrender of Lee's army in April 1865 and the effective end of the Civil War.

The campaign included two long-range raids by Union cavalry under Maj. Gen. Philip Sheridan. In a raid toward Richmond, Confederate cavalry commander Maj. Gen. J.E.B. Stuart was mortally wounded at the Battle of Yellow Tavern (May 11). In a raid attempting to destroy the Virginia Central Railroad to the west, Sheridan was thwarted by Maj. Gen. Wade Hampton at the Battle of Trevilian Station (June 11–12), the largest all-cavalry battle of the war.

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Grant was less reckless with his soldiers' lives than his predecessors had been. No single day of Grant's pounding saw the magnitude of Union casualties that McClellan incurred in one day at Antietam, and no three consecutive days of Grant's warring proved as costly to the Union in blood as did Meade's three days at Gettysburg. ... Grant and Lee were about as evenly matched in military talent as any two opposing generals have ever been. Grant's strength was unwavering adherence to his strategic objective. He made mistakes, but the overall pattern of his campaign reveals an innovative general employing thoughtful combinations of maneuver and force to bring a difficult adversary to bay on his home turf. Lee's strength was resilience and the fierce devotion that he inspired in his troops. He, too, made mistakes and often placed his smaller army in peril. But each time—Spotsylvania Court House and the North Anna River come to mind—he improvised solutions that turned bad situations his way.

Gordon C. Rhea, In the Footsteps of Grant and Lee