The fort had been the source of tension between the Union and Confederacy for several months. After South Carolina seceded on December 20, 1860, the state demanded the fort be turned over but Union officials refused. A supply ship, the "Star of the West," tried to reach Fort Sumter on January 9, but the shore batteries opened fire and drove it away. For both sides, Sumter was a symbol of sovereignty. The Union could not allow it to fall to the Confederates, although throughout the Deep South other federal installations had been seized. For South Carolinians, secession meant little if the Yankees still held the stronghold. The issue hung in the air when Abraham Lincoln took the oath of office on March 4, stating in his inauguration address: "You can have no conflict without being yourselves the aggressors."
Lincoln did not try to send reinforcements but he did send in food. This way, Lincoln could characterize the operation as a humanitarian mission, bringing, in his words, "food for hungry men." He sent word to the Confederates in Charleston of his intentions on April 6. The Confederate Congress at Montgomery, Alabama, had decided on February 15 that Sumter and other forts must be acquired "either by negotiation or force." Negotiation, it seemed, had failed. The Confederates demanded surrender of the fort, but Major Robert Anderson, commander of Fort Sumter, refused.
At 4:30 a.m. on April 12, the Confederate guns opened fire. For thirty-three hours, the shore batteries lobbed 4,000 shells in the direction of the fort. Finally, the garrison inside the battered fort raised the white flag. No one on either side had been killed, although two Union soldiers died when the departing soldiers fired a gun salute, and some cartridges exploded prematurely. It was a nearly bloodless beginning to America's bloodiest war.