The correct answer to this open question is the following.
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Abraham Lincoln's primary purpose with these final words was to honor the soldiers who died in the Civil War.
We are talking about the famous Gettysburg address, delivered by US President Abraham Lincoln on November 18, 1863, in the Soldier's National Cemetery.
President Lincoln referred to the principles that supported the Declaration of Independence and how the soldiers on the battlefield tried to defend those ideals of liberty and equality.
The commentary had been the place of one of the bloodiest battles of the Civil War.