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BATTLE // May 31, 1864

Battle of Cold Harbor

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Overview

The Battle of Cold Harbor was fought during the American Civil War near Mechanicsville, Virginia, from May 31 to June 12, 1864, with the most significant fighting occurring on June 3. It was one of the final battles of Union Lt. Gen. Ulysses S. Grant's Overland Campaign. Thousands of Union soldiers were killed or wounded in the frontal assault of June 3 against the fortified positions of Confederate Gen. Robert E. Lee's army—an action that intensified criticism of Grant's perceived indifference to heavy casualties.

Overview adapted from Wikipedia, licensed under CC BY-SA 4.0.

Significance

Cold Harbor was one of the final engagements of Grant's Overland Campaign in Virginia. The battle is defined above all by the frontal assault of June 3, in which Union forces suffered the majority of their approximately 12,700 casualties attacking Confederate fortified positions. Lee's army, roughly half the size of Grant's force, held its lines and inflicted disproportionate losses—around 5,287 Confederate casualties against more than twice that number on the Union side. The outcome intensified criticism of Grant's generalship and his willingness to absorb heavy losses. Despite the tactical repulse, the engagement did not halt the broader Union strategic effort; Grant subsequently shifted the Army of the Potomac toward Petersburg, continuing pressure on Lee's forces. Cold Harbor thus stands as a costly Union failure within a campaign that, despite its attrition, kept Lee's army on the strategic defensive.

Tactics

Union forces under Grant and Meade launched a frontal assault on June 3 against Confederate positions that had been fortified and entrenched. The Confederate army under Lee held prepared defensive works, and the attacking Union suffered severe casualties in the assault against these fortified lines. The overview does not provide further detail on specific maneuvers, formations, or terrain use beyond the character of the attack as a frontal assault on entrenched positions.

Forces & casualties

Troop strength

  • United States108,000–117,000
    medium
  • Confederate States59,000–62,000
    medium

United States fielded a 1.9 : 1 numerical advantage

Casualties

  • United States12,738
    medium11% loss rate
  • Confederate States5,287
    medium9% loss rate

Commanders (3)

Confederate States

United States

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6 sibling battles · 2 factions

Last verified June 2026
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