At the end of almost every July 4th fireworks show, there's a grand finale. Many times, that finale of explosions is accompanied by a stirring rendition of Pyotr Ilyich Tchaikovsky's "1812 Overture." It seems a natural fit for independence day: a rousing theme that ends with a volley of cannon fire and chiming bells.  The only problem is that the theme, though based on a war, has nothing to do with the United States and certainly nothing to do with the War of 1812. The only thing the U.S. has...