When President Donald J. Trump announced the creation of America's sixth branch of the military, the United States Space Force, many in Washington scoffed. But, U.S. rivals in China, Russia, Iran, and North Korea took notice. Since the end of the Cold War, these American foes have chafed under the full-spectrum dominance that the American superpower has enjoyed globally. They have identified space as a key strategic domain where they can challenge--and possibly defeat--the United States military. And, depriving the U.S. military and/or its economy of access to space during an international crisis could spell doom for the United States in other strategic domains (land, sea, air, and cyberspace). After all, space is critical for America's vaunted information dominance. Satellites overhead are the backbone of America's global military. Remove them from orbit and U.S. forces worldwide are rendered deaf, dumb, and blind.