Portrait of Robert E. Lee

The Battle of Gaines’ Mill was Confederate General Robert E. Lee’s first major victory in the Civil War. [Wikimedia Commons]

Battle of Gaines' Mill Facts

June 27, 1862

Key facts about the Battle of Gaines' Mill.

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Also Known As

  • First Battle of Cold Harbor,
  • Battle of Chickahominy River

Date and Location

  • June 27, 1862
  • Hanover County, Virginia

Campaign

Principal Union Commanders

Principal Confederate Commanders

Union Forces Engaged

  • Army of the Potomac

Confederate Forces Engaged

  • Army of Northern Virginia

Number of Union Soldiers Engaged

  • Roughly 34,000

Number of Confederate Soldiers Engaged

  • Roughly 57,000

Estimated Union Casualties

  • 6,837 (894 killed, 3,107 wounded, 2,836 missing or captured)

Estimated Confederate Casualties

  • 7,993 (1,483 killed, 6,402 wounded, 108 missing or captured)

Result

  • Confederate victory

Significance

  • The Battle of Gaines’s Mill was the third engagement of the Seven Days Battles during the Peninsula Campaign.
  • The Battle of Gaines’ Mill was Confederate General Robert E. Lee’s first major victory in the Civil War.
  • The Battle of Gaines’ Mill was the largest of the Seven Days Battles.
  • The last Confederate assault against Union lines at the Battle of Gaines’ Mill employed 32,000 Rebel soldiers and was the largest of the Civil War.
  • The Battle of Gaines’ Mill was the only clear-cut Confederate tactical victory of the Peninsula Campaign.
  • Seven Union soldiers were awarded the Medal of Honor for valor during the Battle of Gaines’ Mill.

Timeline of the Peninsula Campaign

These are the main battles and events of the Peninsula Campaign in order. The battles that occurred from June 25 to July 1, 1862, are collectively known as the Seven Days Battles.

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Citation Information

The following information is provided for citations.

  • Article Title Battle of Gaines' Mill Facts
  • Coverage June 27, 1862
  • Author
  • Keywords Battle of Gaines' Mill
  • Website Name American History Central
  • Access Date July 31, 2021
  • Publisher R.Squared Communications, LLC
  • Original Published Date
  • Date of Last Update March 13, 2021
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