It's worth noting also that the United States of America in the 19th Century was arguably the most Biblically literate of any society the world has ever known...and this included many slaves.
Even just looking at the birth registry attests to this, with so many newborns being given names like: Abraham (Lincoln), or Thaddeus, Abner, Ebenezer, Amos, or in the case of females: Tabitha, Ruth, Jemima...
In other words: tributes to every crevice of Scripture including the obscure, and not only the usual Matthews, Marks, and Johns and James.
As Lincoln noted in his Second Inaugural:
Both read the same Bible, and pray to the same God; and each invokes His aid against the other. It may seem strange that any men should dare to ask a just God's assistance in wringing their bread from the sweat of other men's faces; but let us judge not that we be not judged. The prayers of both could not be answered; that of neither has been answered fully. The Almighty has His own purposes...
Indeed, these people were STEEPED in the Word of God. And no doubt: the Civil War tried and tested the faith of many.
God answers all prayers. Sometimes the answer is "No."...........