Sherman's capture of Atlanta shattered Confederate morale, saved Lincoln's reelection, and opened the door to his devastating March to the Sea.
Atlanta was the industrial and railroad heart of the Confederacy — a city of foundries, arsenals, and rail lines that kept Confederate armies supplied. Sherman spent four months maneuvering to take it, knowing its fall could break the South's will to fight.
Confederate General John Bell Hood, placed in command specifically because he was more aggressive than his predecessor Joseph Johnston, launched a series of costly counterattacks against Sherman's forces — losing tens of thousands of men in battles around Atlanta that weakened his army catastrophically.
Sherman's masterstroke came when he swung his entire army around Atlanta to cut Hood's last rail supply line to the south. With no way to feed his army or the city, Hood had no choice but to abandon Atlanta — an admission of defeat that echoed across the Confederacy.
On the night of September 1, 1864, as Confederate troops marched out, Hood ordered the destruction of 81 rail cars packed with ammunition and military supplies. The explosions were heard for miles and continued in thunderous waves through the night — a fitting funeral for Confederate Atlanta.
Sherman's telegraph to Lincoln — 'Atlanta is ours, and fairly won' — arrived just as the president's reelection campaign appeared doomed. Northern war-weariness had been threatening to hand the presidency to a peace Democrat who might negotiate an armistice; Atlanta's fall transformed Lincoln's chances overnight.
Sherman ordered all civilians to evacuate Atlanta before he began using it as a military base, drawing furious protests from Hood. Sherman's reply was blunt: 'War is cruelty, and you cannot refine it.' He then used Atlanta as the staging point for his famous March to the Sea.