If a major war ever happens, low-Earth orbit could turn into a combat zone. To that end, the US Air Force Space Command has created the "Space Mission Force" to train soldiers to operate military satellites in response to threats. "Adversaries have developed and fielded capabilities to disrupt and deny the space systems we operate on behalf of the United States and our allies," writes US General John Hyten. 

"Consequently, [we] must organize, train and equip our space forces in a way that maintains our vigilance."