Something for a Fourth of July weekend. The Battle Cry of Freedom was a popular song North and South during the Civil War. Of course they sang different lyrics to the song. The Union version was such a favorite among the Union troops, that President Lincoln, in a letter to George F. Root, the composer, wrote: “You have done more than a hundred generals and a thousand  orators. If you could not shoulder a musket in defense of your country, you certainly have served her through your songs.”
Here is the Southern version sung by Bobby Horton who has waged a one man campaign to bring Civil War music to modern audiences:
Here is the version from the Lincoln (2012) movie:
And another rendition of the Southern version: