Turning point of the American Civil War

• 1. Introduction

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  The turning point of the American Civil War is not a settled question. Historians have argued for decades over which battle or development sealed the Union's eventual victory, and the debate is livelier than most people expect. Was it a single day of carnage along Antietam Creek in September 1862? The near-simultaneous fall of two Mississippi strongholds on the 4th of July, 1863? A general's appointment? A presidential reelection? The answer, it turns out, depends on what you think a turning point actually means. Some historians look for the moment Confederate military power peaked. Others look for the moment Union political will was locked in. Still others look for the moment European powers quietly gave up on the South. What the evidence reveals is a war that shifted not in a single instant but through a series of events, each one narrowing the possible futures available to the Confederacy. And the place to start is not the famous battlefield in Pennsylvania. It is a summer afternoon in Virginia in 1861, when a Union army marched out to crush a rebellion it expected to end in a single afternoon.

• 2. Bull Run and Its Aftermath

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  The First Battle of Bull Run, fought on the 21st of July, 1861, was supposed to end quickly. Northern opinion held that a direct strike at the Confederate capital in Richmond, Virginia, would collapse the rebellion before it could take root. Brigadier General Irvin McDowell's army marched out with that expectation, and the Confederates routed it. The defeat shocked a Northern public that had not imagined a lengthy war, and it forced a brutal reckoning with how hard the coming years would be. That shock, paradoxically, hardened Union resolve rather than breaking it. Lincoln responded by signing legislation that expanded the Union Army by 500,000 men and extended their terms of service for the war's duration. The Confederacy's hopes of draining Northern willpower through a limited military effort were undercut by the very battle it won. Congress moved quickly on another front as well, passing the Confiscation Act of 1861, which declared that any slaveholder who put his slaves to work in support of the Confederacy would forfeit his claim to them. Slavery's legal status in wartime remained murky, but this act was the first time Congress had linked the conflict to the institution in legislative language. The question of what the war was actually about had begun to acquire a legal answer.

• 3. The Kentucky Blunder

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  On the 3rd of September, 1861, Confederate General Leonidas Polk made a decision that his own government had not authorized. He extended the Confederate defensive line northward from Tennessee by ordering Gideon Pillow to occupy Columbus, Kentucky, in response to Ulysses S. Grant's occupation of Belmont, Missouri, just across the Mississippi River. Kentucky had declared itself neutral, a stance Lincoln described as moderately pro-Confederate, and the state held enormous strategic weight. Its position gave whoever controlled it access to the Tennessee and Ohio rivers and a corridor from which the vital state of Ohio could be threatened. Lincoln wrote plainly about the stakes: "I think to lose Kentucky is nearly the same as to lose the whole game." Polk's invasion enraged Kentuckians who had accepted neutrality as a workable accommodation. The state legislature overrode Governor Beriah Magoffin's veto and asked the federal government for help. From that moment, Kentucky was never a safe area of operation for Confederate forces. Polk had not been acting on orders from Richmond; the blunder was almost entirely his own. The early Union successes across the entire Western Theater can be traced directly back to that unauthorized advance.

• 4. Forts, Rivers, and Grant

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  By the 16th of February, 1862, Ulysses S. Grant had completed the capture of both Fort Henry and Fort Donelson in Tennessee, extracting an unconditional Confederate surrender at the latter. These were the first significant Union victories of the war. Their strategic impact was immediate: the Tennessee and Cumberland Rivers opened as Union supply lines and invasion corridors reaching into Tennessee, Mississippi, and eventually Georgia. Confederate control of those waterways was gone. The press coverage that followed the victories launched Grant's national profile and began propelling him toward command of the Army of the Potomac, the army that would eventually accept Robert E. Lee's surrender at Appomattox Court House. Albert Sidney Johnston, who commanded all Confederate forces between the Cumberland Gap and Arkansas, had recommended before these battles that the forts be reinforced and better equipped. The Confederate government had not followed through. When the forts fell, blame settled incorrectly on Johnston; he continued in command and reorganized his forces with P. G. T. Beauregard into the Army of Mississippi. At the Battle of Shiloh in April 1862, Johnston personally led the attack, was wounded in the knee by what may have been friendly fire, and died within an hour after a hit severed his popliteal artery. The reassignment of his command to less capable generals accelerated the Confederacy's deterioration in the Western Theater.

• 5. New Orleans and the Emancipation Pivot

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  Confederate strategists had assumed the main threat to New Orleans would arrive from the north, so when Flag Officer David Farragut forced the Union Navy's West Gulf Blockading Squadron past the two Confederate forts below the city in the Battle of Forts Jackson and St. Philip, the city had nothing left to resist with. New Orleans, by far the largest city in the Confederacy, fell undamaged into Union hands, tightening the grip on the Mississippi River and fulfilling a central element of the Anaconda Plan. Confederate agents in London and Paris found themselves received considerably more coolly after news of the city's loss reached Europe. Five months later, the Battle of Antietam on the 17th of September, 1862, produced a different kind of consequence. Though widely considered a tactical draw between George B. McClellan's Army of the Potomac and Robert E. Lee's smaller Army of Northern Virginia, it halted Lee's invasion of the North and gave Lincoln the battlefield result his cabinet had urged him to wait for. Lincoln had been counseled not to issue his Emancipation Proclamation from a position of apparent desperation. With Antietam as cover, he announced a preliminary proclamation on the heels of the battle, stating that on the 1st of January, 1863, all enslaved people in rebellious states would be declared free. That declaration effectively closed off British diplomatic recognition of the Confederacy. British public opinion ran strongly against slavery, and supporting a government now openly fighting to preserve it became politically impossible.

• 6. Gettysburg and Vicksburg

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  Between the 1st and the 3rd of July, 1863, the Army of the Potomac under Major General George Meade repelled Robert E. Lee's second attempt to carry the war into the North. The three days of fighting at Gettysburg produced over 50,000 casualties across both armies, the highest total of any battle in American military history. The National Park Service marks the point where Pickett's Charge collapsed, at a copse of trees on Cemetery Ridge, as the high-water mark of the Confederacy. After Gettysburg, Lee ceased launching strategic offensive operations against the Union. On the 4th of July, 1863, the day following the Union victory at Gettysburg, the Confederate stronghold at Vicksburg, Mississippi, fell to Grant in the Siege of Vicksburg. Lincoln had described the city's significance directly: "See what a lot of land these fellows hold, of which Vicksburg is the key! The war can never be brought to a close until that key is in our pocket." Losing Vicksburg split the Confederacy along the Mississippi River, cutting off supplies from Texas and Arkansas. European investors registered the shift immediately: economic historians have noted that the probability of a Confederate victory in the bond market dropped from roughly 42 percent before the twin battles to about 15 percent by the end of 1863. Among Confederate forces, the sense that "the coil was tightening around us" spread through the ranks. Lincoln, meanwhile, was distraught that Meade had not pursued Lee's retreating army more aggressively, believing a determined follow-up might have ended the war two years earlier.

• 7. Grant in Command

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  On the 12th of March, 1864, Grant was appointed general-in-chief of all Union armies. He left William T. Sherman in command in the Western Theater and moved his headquarters east to Virginia. Previous Union commanders in the Eastern Theater had repeatedly failed to mount effective campaigns or to press advantages after the rare victory. Grant's approach was different in conception: he devised a coordinated strategy striking at the Confederacy simultaneously from multiple directions, targeting Lee and Richmond, the Shenandoah Valley, Johnston and Atlanta, Confederate railroad lines in western Virginia, and the port of Mobile. In May 1864 he launched the Overland Campaign, an attritional drive toward Richmond that was designed to exploit the Union's advantages in population and material resources. His first direct engagement with Lee, the Battle of the Wilderness, went against him tactically. He pressed forward regardless. The unrelenting pressure he maintained from that point forward did not lift until the Confederate capital fell and Lee's Army of Northern Virginia surrendered. Sherman's capture of Atlanta in September 1864 added a separate momentum: the heavily fortified city was the most important remaining Confederate stronghold in the interior South, and its fall restored Union morale in time to secure Lincoln's reelection in November 1864 against former general George B. McClellan, who ran on a Democratic platform favoring a negotiated settlement. The Confederacy's last realistic path to survival had required a McClellan presidency.