Why Was the Battle of Gettysburg Important? The 1863 Union Victory Explained
United States of America
The Battle of Gettysburg was important because the Union's three-day victory stopped General Robert E. Lee's invasion of the North and marked the turning point of the American Civil War. Fought from July 1–3, 1863, around the small Pennsylvania town of Gettysburg, it pitted Lee's Army of Northern Virginia against the Union Army of the Potomac under General George Meade. Lee's defeat ended Confederate hopes of a decisive strike on Northern soil, and combined with the fall of Vicksburg days later, put the Confederacy permanently on the defensive.
Outcome
Union victory
Commanders
George G. MeadeCommanding general, Army of the Potomac · Union
John F. ReynoldsCommander of the Union left wing and I Corps · Union
Winfield S. HancockCommander of the Union II Corps · Union
Robert E. LeeCommanding general, Army of Northern Virginia · Confederate
James LongstreetCommander of the First Corps · Confederate
Richard S. EwellCommander of the Second Corps · Confederate
A. P. HillCommander of the Third Corps · Confederate
The Road North
By the summer of 1863, the American Civil War had entered its third year. The Confederacy had won important victories in Virginia, but it had not achieved the decisive breakthrough it needed. The Union’s naval blockade was tightening, the Confederate economy was under increasing pressure, and the war was becoming a contest of manpower and endurance.
Robert E. Lee believed that the best way to change the war’s direction was to invade the North again. A successful campaign in Pennsylvania might threaten Philadelphia or Baltimore, damage Northern morale, and encourage political pressure for peace. It could also allow Lee’s Army of Northern Virginia to live off Northern farmland instead of the increasingly exhausted countryside of Virginia.
Lee’s army moved north through the Shenandoah Valley and crossed the Potomac River in June 1863. For a short time, the Union Army of the Potomac did not know exactly where he was going. That uncertainty created panic across Pennsylvania, but it also gave the Union time to reorganize.
New Command in the East
The Union Army of the Potomac had recently suffered a major defeat at Chancellorsville. Its commander, Joseph Hooker, stepped down after a dispute with President Abraham Lincoln and General-in-Chief Henry Halleck. On 28 June, George G. Meade was appointed to command the army.
Meade had only days to take control before the armies collided. He did not have the luxury of designing an entirely new campaign. His immediate task was to find Lee, protect Washington and Baltimore, and prevent the Confederate army from reaching the Susquehanna River.
His army numbered about 96,400 men: approximately 77,200 infantry, 12,000 cavalry, and around 7,200 artillerymen serving roughly 370 guns. Lee’s Army of Northern Virginia fielded about 68,600–71,800 men, including approximately 57,200 infantry, 6,800–10,000 cavalry, and about 4,600 artillerymen with 270–285 guns.
The Union army was larger, but Lee’s soldiers were experienced, confident, and accustomed to victory. The Confederates had crossed into Pennsylvania believing that they were carrying the war into enemy territory. They did not yet know that the roads around a small crossroads town would become the place where their invasion ended.
A Town at the Crossroads
Gettysburg was not a fortress or a major industrial centre. It was a town surrounded by farms, orchards, fields, and low ridges. Its importance came from the roads that met there. Roads from Chambersburg, Carlisle, Harrisburg, Taneytown, Emmitsburg, and Baltimore converged around the town, making it a natural meeting point for armies moving through southern Pennsylvania.
On 30 June, Confederate troops from A. P. Hill's Third Corps headed toward Gettysburg, looking for supplies. They didn't expect to run into the Union army. But on the edge of town, they spotted Union cavalry under Brigadier General John Buford — and pulled back without a fight.
Buford saw right away that the ridges around the town mattered more than the town itself. If the Union could hold the high ground to the south, more troops could arrive and form a strong defense. If the Confederates got there first, Meade's army would be at a serious disadvantage.
So the fighting that followed wasn't the result of either side picking Gettysburg on purpose. It happened because both armies realized, almost by accident, that this crossroads was worth fighting for.
Britannica — Battle of Gettysburg.
Wikipedia - Battle of Gettysburg
American Battlefield Trust — The Battle of Gettysburg
American Battlefield Trust — Pickett’s Charge.
U.S. Army Center of Military History — The Gettysburg Campaign, June–July 1863.