For the first three days of July 1863, Gettysburg, Pennsylvania, became the site of one of the bloodiest battles of the Civil War, when General Robert E. Lee’s Army of Northern Virginia clashed with the Union Army of the Potomac, led by General George Meade. This oval-shaped map depicts the positions occupied by both Union and Confederate troops and artillery throughout the three-day battle, along with roads, railways, and homes with the names of residents.