No sooner was he in office than Lincoln received word that the Sumter garrison, unless supplied or withdrawn, would shortly be starved out. Still, for about a month, Lincoln delayed acting. He was beset by contradictory advice. On the one hand, General Scott, Secretary of State William H. Seward, and others urged him to abandon the fort; and Seward, through a go-between, gave a group of Confederate commissioners to understand that the fort would in fact be abandoned. On the other hand, many Republicans insisted that any show of weakness would bring disaster to their party and to the Union. Finally Lincoln ordered the preparation of two relief expeditions, one for Fort Sumter and the other for Fort Pickens, in Florida. (He afterward said he would have been willing to withdraw from Sumter if he could have been sure of holding Pickens.) Before the Sumter expedition, he sent a messenger to tell the South Carolina governor:

I am directed by the President of the United States to notify you to expect an attempt will be made to supply Fort-Sumpter [sic] with provisions only; and that, if such attempt be not resisted, no effort to throw in men, arms, or ammunition, will be made, without further notice, or in case of an attack upon the Fort.

Without waiting for the arrival of Lincoln’s expedition, the Confederate authorities presented to Major Anderson a demand for Sumter’s prompt evacuation, which he refused. On April 12, 1861, at dawn, the Confederate batteries in the harbor opened fire.

“Then, and thereby,” Lincoln informed Congress when it met on July 4, “the assailants of the Government, began the conflict of arms.” The Confederates, however, accused him of being the real aggressor. They said he had cleverly maneuvered them into firing the first shot so as to put upon them the onus of war guilt. Although some historians have repeated this charge, it appears to be a gross distortion of the facts. Lincoln was determined to preserve the Union, and to do so he thought he must take a stand against the Confederacy. He concluded he might as well take this stand at Sumter.

Lincoln’s primary aim was neither to provoke war nor to maintain peace. In preserving the Union, he would have been glad to preserve the peace also, but he was ready to risk a war that he thought would be short.

After the firing on Fort Sumter, Lincoln called upon the state governors for troops (Virginia and three other states of the upper South responded by joining the Confederacy). He then proclaimed a blockade of the Southern ports. These steps—the Sumter expedition, the call for volunteers, and the blockade—were the first important decisions of Lincoln as commander in chief of the army and navy. But he still needed a strategic plan and a command system for carrying it out.

General Scott advised him to avoid battle with the Confederate forces in Virginia, to get control of the Mississippi River, and by tightening the blockade to hold the South in a gigantic squeeze. Lincoln had little confidence in Scott’s comparatively passive and bloodless “Anaconda” plan. He believed the war must be actively fought if it ever was to be won. Overruling Scott, he ordered a direct advance on the Virginia front, which resulted in defeat and rout for the federal forces at Bull Run (July 21, 1861). After a succession of more or less sleepless nights, Lincoln produced a set of memorandums on military policy. His basic thought was that the armies should advance concurrently on several fronts and should move so as to hold and use the support of Unionists in Missouri, Kentucky, western Virginia, and eastern Tennessee. As he later explained:

I state my general idea of this war to be that we have the greater numbers, and the enemy has the greater facility of concentrating forces upon points of collision; that we must fail, unless we can find some way of making our advantage an over-match for his; and that this can only be done by menacing him with superior forces at different points, at the same time.

This, with the naval blockade, comprised the essence of Lincoln’s strategy.