"Narrator: In June 1863, after more than two years of bloody conflict, the Confederate Army of Northern Virginia, Robert E. Lee commanding, slips across the Potomac to begin the invasion of the North. It is an army of 70,000 men. They move slowly behind the Blue Ridge using the mountains to screen their movements. Their objective is to draw the Union army out into the open where it can be destroyed. Late in June, the Union Army of the Potomac, 80,000 men, turns north from Virginia to begin the great pursuit up the narrow roads across Maryland and into Pennsylvania. General Lee knows that a letter has been prepared by the Southern government; a letter which offers peace. It is to be placed on the desk of Abraham Lincoln, President of the United States, the day after Lee has destroyed the Army of the Potomac somewhere north of Washington."