A borough of southern Pennsylvania east-southeast of Chambersburg. It was the site of a major Union victory in the Civil War (July 1-3, 1863), which checked Robert E. Lee's invasion of the North. The battle and Abraham Lincoln's famous Gettysburg Address (delivered at the dedication of a cemetery here on November 19, 1863) are commemorated by a national park. President Dwight D. Eisenhower's farm, a national historic site, is also in Gettysburg.