Yellowstone was our nation's first national park. Its strange, wondrous landscapes were perfect for exploration and exploitation. Upon Yellowstone's discovery by white Americans, two races began: one to build a railroad to the park to capture its commercial potential, another to protect the land from desecration. One will fail, bringing down with it the nation's economy. The other will require the U.S. Army to succeed, but leave thousands of animals slaughtered and Native American tribes displaced.