Final answer:
Abraham Lincoln's Gettysburg Address underlines the sacrifice of Union soldiers as pivotal for preserving the Union and ensuring freedom and equality, with the enduring notion that democracy shall not perish.
Step-by-step explanation:
In his Gettysburg Address, Abraham Lincoln elucidated why the soldiers who fought and died at Gettysburg would be eternally remembered. He proclaimed that these Union soldiers perished not only to preserve the Union but also to ensure the enduring values of freedom and equality for all. By invoking the Founding Fathers and the spirit of the American Revolution, Lincoln connected the Civil War struggle to the broader narrative of American democratic principles. Ultimately, Lincoln's address reinforces the notion that the sacrifices made at Gettysburg were crucial for a 'new birth of freedom,' ensuring that the government of the people, by the people, for the people, shall not vanish.