Answer:
During the American Civil War, President Abraham Lincoln gave a speech at Gettysburg's National Cemetery on November 1863, to honor the Soldier's commitment, it was called "The Gettysburg Address", which conveyed his thought about life, politics, and morality, and pointing out how men are created equal, to emphasize this to the beginning of the new nation recently founded, alluding to the declaration of independence and appealing to the people's sentiment and feelings of uncertainty and skepticism about the Civil War's worthiness, in order to infuse confidence, by making the parallel associating that stage in importance with the early foundation of the country.
He positioned the events as a step forward in the right direction to mark the American history as it was intended with the Declaration of Independence, repeatedly using the statement "The Union" all the way, as synonym of a new nation, setting out a broader definition of Liberty.