The Civil War's bloodiest battle with 51,000 casualties over three days in the summer of 1863 and the backdrop for President Abraham Lincoln's famous Gettysburg Address, the Gettysburg National Military Park features the Eternal Light Peace Memorial, Gettysburg National Military Park Visitor Center, McMillan Woods Youth Campground, a self-guided auto tour, licensed guide tour, tape or CD tours, the Gettysburg Museum of the Civil War, and more.