Battle of Gettysburg
Modern scholarship locates the speakers' platform 40 yards (or more) away from the traditional site in Soldiers' National Cemetery at the Soldiers' National Monument, such that it stood entirely within the private, adjacent Evergreen Cemetery.
Evergreen Cemetery is eponymous with Cemetery Hill, the landform noted as the keystone of the Union position during the Battle of Gettysburg.
Major-General Oliver Otis Howard lined the cemetery's high ground with cannons, turning it into an "artillery platform,"and made its gatehouse into XI Corps (Union Army) headquarters.
In his Gettysburg address Lincoln included "under God" in all three copies of the address he prepared at later dates. "Under God" pointed backward and forward: back to "this nation", which drew its breath from both political and religious sources, but also forward to a "new birth".
Lincoln had come to see the Civil War as a ritual of purification. The old Union had to die. The old man had to die. Death became a transition to a new Union and a new humanity.
…
“Lincoln's rhetoric is, instead, deliberately Biblical.
(It is difficult to find a single obviously classical reference in any of his speeches.) Lincoln had mastered the sound of the King James Bible so completely that he could recast abstract issues of constitutional law in Biblical terms, making the proposition that Texas and New Hampshire should be forever bound by a single post office sound like something right out of Genesis."
https://en.wikipedia.org/wiki/Gettysburg_Address