Battle of Gettysburg

The Battle of Gettysburg was a major battle of the American Civil War fought from July 1 to July 3, 1863, in and around the town of Gettysburg, Pennsylvania, resulting in a Union victory and widely regarded as the war's turning point. It pitted the Union Army of the Potomac, commanded by Major General George G. Meade, against the Confederate Army of Northern Virginia, led by General Robert E. Lee. The battle ended Lee’s second invasion of the North and inflicted severe casualties on both sides, after which the Confederate army retreated, never again launching a major offensive into Union territory.

Background

In the spring of 1863, after his decisive victory at the Battle of Chancellorsville, General Robert E. Lee decided to invade the North for a second time. He aimed to relieve pressure on war-torn Virginia, gather supplies in the fertile Pennsylvania countryside, threaten Northern cities such as Harrisburg and Philadelphia, and possibly force a peace settlement by winning a decisive battle on Union soil. Lee’s army, numbering roughly 75,000 men, marched north through the Shenandoah Valley into Maryland and Pennsylvania. The Union Army of the Potomac, under its new commander Major General George G. Meade (appointed just days before the battle), moved north in pursuit, with around 93,000 men.

The Armies

The Confederate Army of Northern Virginia was organized into three infantry corps under Lieutenant Generals James Longstreet, Richard S. Ewell, and A.P. Hill, plus a cavalry division under Major General J.E.B. Stuart. Stuart’s cavalry was absent from the army during the early stages of the campaign, conducting a wide raid around the Union army, which deprived Lee of critical intelligence about Union troop movements. The Union Army of the Potomac consisted of seven infantry corps and a cavalry corps, commanded by Major General Alfred Pleasonton. Meade’s forces were well-supplied and entrenched in strong defensive positions by the time of the main engagement.

First Day (July 1, 1863)

On July 1, Confederate forces under A.P. Hill encountered Union cavalry under Brigadier General John Buford west of Gettysburg. Buford deployed his troopers dismounted in a delaying action, holding off Confederate infantry long enough for Union infantry reinforcements to arrive. As the day progressed, both sides fed in more troops. The Union I Corps under Major General John F. Reynolds arrived to support the cavalry; Reynolds was killed early in the fighting. By mid-afternoon, Confederate reinforcements—Ewell’s corps—arrived from the north and struck the Union flank, forcing Union forces to retreat through the town of Gettysburg to the high ground south of town: Cemetery Hill, Culp’s Hill, and Cemetery Ridge. The first day ended with Confederates holding the town and the Union in a strong defensive crescent-shaped line.

Second Day (July 2, 1863)

On July 2, Lee ordered attacks on both flanks of the Union position. The main Confederate assault—Longstreet’s corps—was directed against the Union left flank, anchored on Little Round Top and the Peach Orchard. After a prolonged delay, Longstreet’s divisions attacked in the late afternoon, driving Union forces from the Peach Orchard and Wheatfield but failing to seize Little Round Top, which was occupied by Union troops just in time (including the 20th Maine under Colonel Joshua Chamberlain). To the north, Ewell launched a diversionary assault on Culp’s Hill and Cemetery Hill; Union defenders held these positions through the night. By the end of the second day, the Union line remained intact, though both sides suffered heavy losses.

Third Day (July 3, 1863)

On July 3, Lee decided to launch a massive assault on the center of the Union line on Cemetery Ridge, hoping that a breakthrough would split the Union army. After a two-hour artillery bombardment—the largest of the war, involving over 150 Confederate guns—approximately 12,000 Confederate infantry under Major General George Pickett, Isaac Trimble, and James Pettigrew advanced across nearly a mile of open ground. This frontal assault, known as Pickett’s Charge, was met by devastating Union artillery and rifle fire. The Confederate column reached the Union line at a stone wall (the “Angle”) but was repulsed with more than 50% casualties. The attack marked the climactic failure of the battle. Meanwhile, Union cavalry under Brigadier General George Armstrong Custer fought a delaying action against Confederate cavalry under Stuart east of Gettysburg, preventing them from striking the Union rear.

Aftermath and Significance

After Pickett’s Charge, Lee’s army remained in position on July 4 but was unable to attack again. That night, under cover of rain, Lee began a retreat back to Virginia, pursued half-heartedly by Meade. The Union victory at Gettysburg, combined with the fall of Vicksburg on July 4, 1863, is often regarded as the turning point of the Civil War. Lee never again invaded the North, and the Confederate army suffered irreplaceable losses in leadership and manpower.

Casualties

The battle produced staggering casualties. Union losses were approximately 23,000 (3,155 killed, 14,529 wounded, 5,365 captured/missing). Confederate losses were roughly 28,000 (4,708 killed, 12,693 wounded, 5,830 captured/missing). The town of Gettysburg was devastated, and the dead and wounded overwhelmed available medical facilities.

Gettysburg Address

On November 19, 1863, President Abraham Lincoln traveled to Gettysburg to dedicate the Soldiers’ National Cemetery. He delivered a brief speech—the Gettysburg Address—that redefined the purpose of the war as a struggle for national unity and human equality. In about two minutes, Lincoln articulated the principles of the Declaration of Independence and called for a “new birth of freedom.”

Legacy

The Battle of Gettysburg remains one of the most studied and commemorated events in American history. The Gettysburg National Military Park was established in 1895 and is administered by the National Park Service, preserving the battlefield and numerous monuments. The battle has been the subject of countless books, films (notably Gettysburg, 1993), and historical analyses. It is remembered for its immense scale, high drama, and the profound impact it had on the outcome of the Civil War and the course of American history.