Confederate General Robert E. Lee suffered his first defeat at the battle of Gettysburg. Prior to this battle, the Army of Northern Virginia was thought to be invincible. On November 19, 1863, President Abraham Lincoln traveled to that small Pennsylvania town to deliver the most famous address ever spoken by an American President. President Lincoln views the rows upon rows of caskets and newly dug graves of the fallen as he approaches the newly constructed platform at the Gettysburg National Cemetery.