Prior to the establishment of a separate United States Air Force (USAF) in 1947, civilian and military theorists began developing concepts for how the military might exploit space-based capabilities. As these ideas matured over the next half century, the space domain became an integral part of routine military operations. With the creation of the Advanced Research Project Agency’s (ARPA) information network, ARPA-net, in the late 1960s and concurrent developments in computer science, the cyberspace domain began to take form and has matured into a unique military domain. These two domains have changed the traditional notions of what constitutes war by expanding war into a global and continuous enterprise, by demanding a premium on rapid technological innovation, and by creating a potentially dangerous uncertainty in the military decision calculus.
The space and cyberspace domains have allowed military operations to occur across the globe and in a continuous manner. Prior to the militarization of space and the introduction of networked computer technology, warfare occurred on a global scale, but physical distance largely isolated field commanders from conflicts in other theaters and from rearward headquarters. Military operations occurred in the traditional domains with a great amount of uncertainty, and information sharing, at its best, occurred by wire, wireless radio, or aircraft message delivery. With the introduction of the satellite, commanders and staffs could communicate over vast distances, know their precise location, and receive space-based intelligence products, meteorological data, and missile warning. Moreover, satellites can provide data and communications to multiple theaters through ground-based, computer-operated information architectures. As cyber operations have come into their own, they show the same capability to effect areas separate from their location and require the same kind of continuous use. Combined or apart, space and cyberspace provide means of a continuous, global power projection unlike what is available from the traditional domains.