The Battle of Gettysburg in July 1863 stands as one of the American Civil War’s pivotal moments – a brutal clash where over 50,000 soldiers became casualties in three days of fighting.
On the final day General Robert E. Lee, commanding the Confederate (Southern) forces, ordered what became known as Pickett’s Charge: a desperate assault by about 12,500 men across open fields toward the Union centre on Cemetery Ridge. The attack, often seen as the high-water mark of the Confederacy, ended in failure and contributed to Lee’s retreat to Virginia.
But what if it had succeeded? What if those grey-clad lines had broken through, routing the (Northern) Union Army of the Potomac? Would the war’s outcome have flipped, granting the South independence and enshrining slavery in America?
To dive into this tantalising alternative history requires one to draw on historical analyses and counterfactual scenarios. The point of divergence would be as follows: instead of faltering under withering Union fire, Pickett’s divisions, bolstered by better artillery preparation and additional brigades from nearby units like General Richard Anderson’s, punch a hole in the Federal lines.
In one scenario frequently modelled by military analysts, committing extra forces (between one and three brigades) would have a strong chance of overwhelming the Union centre, leading to an envelopment where Confederate flanks roll up and destroy key Union corps. The Union troops, already exhausted from two days of combat, break and rout in panic. Generals like Winfield Scott Hancock might be captured or killed, and General Meade’s army scatters, fleeing southward with heavy losses, perhaps as many as 36,000 casualties against the Confederates’ 23,000.
Lee, sensing victory, rests his men briefly before pressing on. Immediately, a Southern win at Gettysburg would electrify the Confederacy. Morale would soar after the humiliating defeats at Antietam and elsewhere; Lee’s Army of Northern Virginia, though battered, could forage in Pennsylvania, offsetting the simultaneous fall of Vicksburg in the West. News of the Confederate victory might also impact the international scene, inviting foreign intervention: Britain and France, eyeing Southern cotton and wary of Union power, would be tempted to recognise the Confederacy, especially if Napoleon III pushed for it.
Lee then marches on Washington DC, overwhelming its defences and forcing President Abraham Lincoln to evacuate to Boston or New York. The capital falls, the Stars and Bars rise over the White House, and panic grips the North. The Confederacy would appear to have won.
But would this truly alter the war’s trajectory? Many historians and analysts argue the opposite. The Union held massive advantages: superior industrial output, a larger population, and control of the seas. Ulysses S. Grant’s Western campaigns would continue unabated, squeezing the Confederacy economically. Even with Gettysburg lost, the Army of the Potomac could regroup at fortified lines like Pipe Creek, reinforced by troops from elsewhere (Grant would likely be recalled East with 48,000 men, rebuilding Union strength to 120,000 by the autumn).
Draft riots and Copperhead (pro-Southern Democrat) gains in Northern elections might intensify, but Lincoln’s resolve – fortified by the moral weight of the Emancipation Proclamation – would rally support. A Confederate victory at Gettysburg might prove to be a costly tactical gain without strategic follow-through.
Some analysts (including even Winston Churchill) have argued that the victory might produce a cascading effect: the boost to morale helps General Joseph E. Johnston reinforce Braxton Bragg in the West, shattering Union forces at Chickamauga and sieging Nashville. By 1864, a peace treaty at Hampton Roads grants Confederate independence, ceding border states and ensuring free Mississippi navigation.
Churchill’s whimsical 1931 essay takes it further: Lee wins, abolishes slavery to court Europe, signs peace with Lincoln, and the two republics form an English-Speaking Association that averts World War I. However, most scholarly counterfactuals often temper this, suggesting even Confederate success might delay but not prevent slavery’s end, highlighting history’s contingency while affirming the actual Union’s victory as a bulwark against persistent racial dystopias.
Ultimately, a successful Pickett’s Charge might prolong the war by months or years, eroding Northern will and inviting diplomacy. But the Union’s inexorable advantages would likely prevail in the end. Gettysburg as a turning point is more a Southern fantasy than a realistic outcome.
In the real world, Lee’s invasion failed, paving the way for Grant’s attrition strategy and Appomattox in 1865. This “what if” reminds us how fragile history is: one charge’s success could reshape a nation, yet structural forces often dictate the endgame.
So much for the counterfactuals. If you’d like to know how the real Battle of Gettysburg played out, please join us at the BRLSI on Monday January 26th (in person or online), when historian Frank Baldwin will give a blow-by-blow account of one of the iconic battles of the 19th century.
https://www.brlsi.org/whatson/gettysburg-the-defining-battle-of-the-american-civil-war/
Joe Houlihan
Convenor for Military History
Engraving of Pickett’s charge at Gettysburg by Alfred Swinton
