Gaines' Mill - June 27, 1862 | American Battlefield Trust
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Gaines' Mill - June 27, 1862

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Gaines' Mill - June 27, 1862 (October 2019)
Gaines' Mill - June 27, 1862 (October 2019)

American Battlefield Trust’s map of the Battle of Gaines’ Mill on June 27, 1862

In the early hours of June 27, 1862, Maj. Gen. Fitz John Porter’s Union V Corps abandoned their position at Beaver Dam Creek and established a new defensive line behind Boatswain’s Swamp, just north of the Chickahominy River. During the afternoon, the Federals beat back successive waves of disjointed Southern attacks, inflicting some of the heaviest casualties the war. By dusk, however, Gen. Robert E. Lee’s Confederates were more organized. The divisions of Maj. Gens. Richard S. Ewell and D. H. Hill from Maj. Gen. Thomas J. “Stonewall” Jackson’s wing supported the Confederate center and left while Maj. Gen. James Longstreet attacked on the right. With daylight fading, the reinforced Southerners assaulted Porter’s line and sent the Northerners fleeing toward the river. The defeat at Gaines’ Mill convinced Maj. Gen. George B. McClellan to abandon the campaign against Richmond and “change his base” to the James River.

Learn More: Battle of Gaines’ Mill