HistoryData
Historical ConflictHanover County

Battle of Cold Harbor

Cold Harbor's failed Union frontal assault on June 3, 1864, became one of the costliest single-day attacks of the Civil War and intensified debate over Grant's generalship.

Duration & Scope

1864 ongoing

< 1 year

Key Facts

Dates
May 31 – June 12, 1864
Most intense fighting
June 3, 1864
Confederate line length
7 miles of fortifications
Distance from Richmond
~10 miles northeast
Campaign context
One of the final battles of Grant's Overland Campaign

Strategic Narrative Overview

Union cavalry seized Old Cold Harbor on May 31 and held it until infantry reinforced them. On June 1, the VI and XVIII Corps attacked Confederate works with partial success. By June 2, both armies were fully in position and Confederate troops had constructed seven miles of extensive earthworks. At dawn on June 3, three Union corps launched a massive frontal assault on the southern Confederate line. The attack was swiftly repelled with severe Union casualties. Follow-on assaults at both ends of the line also failed.

01 / The Origins

By late May 1864, Lt. Gen. Ulysses S. Grant's Overland Campaign had repeatedly attempted to outflank Gen. Robert E. Lee's Confederate Army of Northern Virginia and seize Richmond, Virginia. Both armies had sustained enormous losses through battles at the Wilderness, Spotsylvania, and North Anna. Grant again swung his forces around Lee's right flank, prompting both sides to race for the strategically significant crossroads at Old Cold Harbor, roughly ten miles northeast of the Confederate capital.

03 / The Outcome

After the failed assaults, both armies settled into static positions along the Cold Harbor lines for nearly ten days. Unable to break the Confederate defenses and unwilling to sustain further frontal attacks, Grant disengaged on the night of June 12, shifting the Army of the Potomac south across the James River toward Petersburg. The battle's heavy Union losses, particularly on June 3, deepened criticism of Grant and foreshadowed the siege warfare that would characterize the final phase of the war.

Belligerents & Mobilization Analysis

Side A

1 belligerent

Union Army of the Potomac / Army of the James
Key Commanders

Ulysses S. Grant, George G. Meade.

Side B

1 belligerent

Confederate Army of Northern Virginia
Key Commanders

Robert E. Lee.

Outcome
Confederate defensive victory; Union assault repelled; Grant disengaged and shifted toward Petersburg on June 12

Kinetic Engagement Axis

Major engagements timeline (1864–present)Timeline of major military engagements plotted chronologically.1864present1864Cavalry action a…Allied1864Assault of June …Inconclusive1864Grand assault of…Side B

Scroll horizontally to view full axis. Events plotted relatively.

Side A victorySide B victoryInconclusiveDecisive / turning point

Location

Map of Mechanicsville, United StatesMap of Mechanicsville, United StatesMechanicsville, United States