McClellan was ordered to take his army back to Washington by water; and Lee, advancing, fought another Union force, first at Cedar Mountain and then at Bull Run, where he won two brilliant victories, thus forcing the remainder of those troops to retreat and join McClellan. By this time the people in the North were so frightened that they felt the need of a larger army. Lincoln, therefore, called for more men, who eagerly volunteered, singing the new song: “We’re coming, Father Abraham, three hundred thousand more.”
Encouraged by success, Lee now crossed the Potomac River and marched into Maryland, his army singing “Maryland, my Maryland.” for the Confederates felt very sure that people there would now desert the Union to side with them. They were disappointed, however, and McClellan, having found a copy of Lee’s orders, set off after him, and met him at Antietam, where a terrible battle was fought. Here many men lost their lives, but neither army won a real victory, though Lee soon after returned to Virginia.