The significance of the Gettysburg Address, delivered by President Abraham Lincoln in 1863, lies in its articulation of national ideals of liberty and equality. Commemorating the soldiers who fought at the Battle of Gettysburg, Lincoln emphasized the importance of preserving the Union amidst the Civil War. The address underscored the notion of a united nation committed to democratic principles and equality for all people, making it one of the most revered speeches in American history, reflective of the nation's core values.