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BATTLE // June 3, 1863

Gettysburg campaign

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Overview

The Gettysburg campaign was a military invasion of Pennsylvania by the main Confederate army under General Robert E. Lee in summer 1863. It was the first time during the war the Confederate Army attempted a full-scale invasion of a free state. The Union won a decisive victory at Gettysburg, July 1–3, with heavy casualties on both sides. Lee managed to escape back to Virginia with most of his army. It was a turning point in the American Civil War, with Lee increasingly pushed back toward Richmond until his surrender in April 1865. The Union Army of the Potomac was commanded by Maj. Gen. Joseph Hooker and then by Maj. Gen. George Meade.

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

Significance

The Gettysburg campaign marked the first full-scale Confederate invasion of a free state, as Robert E. Lee led the Army of Northern Virginia into Pennsylvania in the summer of 1863. The Union Army of the Potomac, commanded successively by Hooker and then Meade, achieved a decisive victory over three days of fighting at Gettysburg, though at heavy cost to both sides. Lee withdrew the bulk of his army back to Virginia, preserving his force but failing to achieve the strategic aims of the invasion. The campaign is recognized as a turning point in the American Civil War: following Gettysburg, Lee was increasingly pressed back toward Richmond and did not again mount a comparable offensive into Union territory, a trajectory that continued until his surrender in April 1865.

Forces & casualties

Troop strength

  • United States85,231–104,256
    medium
  • Confederate States75,000
    medium

United States fielded a 1.3 : 1 numerical advantage

Casualties

  • United States32,043
    medium34% loss rate
  • Confederate States27,000–32,000
    medium39% loss rate

Commanders (3)

Confederate States

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Related

6 sibling battles · 2 factions

Last verified June 2026
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