During the July 1-3, 1863 Battle of Gettysburg, there were Christians and Jews on both sides of the conflict who knew the answer to the question “Whose side is God on?”
Or at least they thought they did.
In 1861, Confederate President Jefferson Davis declared: “Our cause is just and holy,” and the South self-assuredly adopted as its motto Deo vindice (“God will vindicate us”). In the same year, Julia Ward Howe composed the “Battle Hymn of the Republic” with the triumphant words: “He hath loosed the fateful lightning of His terrible swift sword. … I have seen Him in the watch-fires of a hundred circling camps. … Glory, glory Hallelujah, His truth is marching on.”