# Space as a Warfighting Domain The United States formally designated space as a warfighting domain — alongside land, sea, air, and cyber — with the establishment of the [[U.S. Space Force]] in December 2019. This was not a new capability but a doctrinal recognition: space had been militarily essential since the first reconnaissance satellites of the 1960s, and adversary development of [[Anti-Satellite Weapons]] had made the threat to space assets impossible to ignore. China, Russia, and other nations have made parallel organizational moves, embedding space warfare capabilities into their military structures. Space as a warfighting domain is the organizing concept for the KB's space-defense thread, connecting [[Anti-Satellite Weapons]], Space-Based ISR, GPS and PNT, and Satellite Constellations to the broader [[Defense Tech Ecosystem]] and the geopolitical competition tracked under [[China]] and [[Russia]]. ## The Dependency Problem Modern militaries are profoundly dependent on space. GPS and PNT provides the positioning and timing that guide precision munitions, synchronize communications networks, and enable force coordination. Satellite communications link commanders to units across the globe. Space-Based ISR provides early warning of missile launches, tracks adversary forces, and monitors treaty compliance. Weather satellites inform operational planning. This dependency is also a vulnerability. An adversary that can degrade or destroy space assets — through [[Anti-Satellite Weapons]], electronic jamming, or cyber attack — can blind, silence, and disorient a space-dependent military. The U.S. military's space dependence is the deepest of any fighting force, which makes the U.S. both the greatest beneficiary and the most exposed to space-domain threats. ## Key Actors **United States.** The [[U.S. Space Force]], organized under the Department of the Air Force, is responsible for organizing, training, and equipping space forces. U.S. Space Command (a combatant command, distinct from the Space Force) exercises operational control of space forces in wartime. The [[National Reconnaissance Office]] operates classified reconnaissance satellites. The Space Development Agency (now part of the Space Force) is building proliferated LEO constellations for missile tracking and data transport. **China.** The People's Liberation Army Strategic Support Force (now reorganized) consolidates China's space, cyber, and electronic warfare capabilities. [[China]] has demonstrated kinetic [[Anti-Satellite Weapons]] (the 2007 test), operates the BeiDou navigation constellation, and is building a robust space-based ISR capability. China's military space program is inseparable from its civilian program — the same organizations build both. **Russia.** [[Russia]]'s Aerospace Forces incorporate space operations, and Russia has demonstrated both direct-ascent and co-orbital ASAT capabilities (the 2021 Nudol test). Russia operates the GLONASS navigation constellation and retains significant space situational awareness capability from the Soviet era, though its space industrial base has deteriorated relative to the U.S. and China. ## The Outer Space Treaty and Its Limits The 1967 Outer Space Treaty — ratified by the U.S., Russia, and China — prohibits placing nuclear weapons or weapons of mass destruction in orbit, establishing military bases on celestial bodies, and claiming sovereignty over celestial bodies. But it does not ban conventional weapons in space, anti-satellite weapons, military reconnaissance from orbit, or the use of space systems to support terrestrial military operations. The treaty was written for an era of two superpowers and a handful of satellites; it offers little guidance for an era of megaconstellations, commercial ISR, and anti-satellite arms racing. Efforts to negotiate additional space-weapons agreements have stalled, largely because the major powers cannot agree on what constitutes a "space weapon" — a satellite that can maneuver close to another satellite is inherently a potential co-orbital ASAT, and dual-use missile-defense interceptors can also kill satellites. ## Doctrinal Concepts **Space control** is the ability to ensure access to space for friendly forces while denying it to adversaries — the space equivalent of air superiority. **Space situational awareness (SSA)** is the ability to track and characterize objects in orbit — knowing what is where, what it is doing, and whether it poses a threat. The U.S. Space Surveillance Network tracks tens of thousands of objects; accurate SSA is the prerequisite for both collision avoidance and space defense. **Resilience** is the architectural response to the ASAT threat: building space systems that can absorb losses and continue operating. Approaches include proliferated constellations (more targets than an adversary can afford to kill), disaggregated architectures (spreading capabilities across many platforms), and rapid reconstitution (the ability to launch replacements quickly, per the [[Replicator Initiative]] logic). The [[Golden Dome]] missile-defense concept represents the most aggressive doctrinal vision: space-based interceptors that would shoot down ballistic and hypersonic missiles from orbit — a concept that, if pursued, would shatter any remaining distinction between peaceful and military uses of space. ## See Also - [[Space Hub]] — parent hub - [[U.S. Space Force]] — the U.S. military space service - [[Anti-Satellite Weapons]] — the offensive threat - Space-Based ISR — intelligence from orbit - GPS and PNT — the navigation dependency - [[Golden Dome]] — the space-based missile defense concept - [[Defense Tech Ecosystem]] — the broader defense technology context - [[Military-Industrial Complex 2.0]] — the new defense-tech industrial base