For most of the Space Age, military space activity was defined by what might be called a support function: satellites that watched, listened, communicated, and navigated, but did not fight. Reconnaissance satellites photographed adversary territory. Communications satellites linked headquarters to forces in the field. GPS guided munitions and vehicles. The weapons themselves stayed on Earth, and the space layer above them was treated, at least in public doctrine, as a sanctuary.
That framing no longer holds, and 2026 has been the year the shift became difficult to describe in any other terms. The United States Space Force now publishes formal doctrine on offensive and defensive “counterspace operations.” China has demonstrated satellites manoeuvring around one another in patterns American officials have publicly called “dogfighting.” Russia has spent several years developing, and now appears to have partially lost, a satellite believed to be a testbed for a nuclear anti-satellite weapon. The Pentagon is building a constellation of orbital interceptors designed to shoot down missiles from space. And a growing bloc of NATO members is quietly building its own military satellite architecture rather than relying solely on the United States.
This piece surveys the major, verifiable trends driving that shift: the doctrine now guiding how space powers think about conflict in orbit, the counter-space weapons being fielded or tested by the major powers, the return of space-based missile defence as a serious national programme rather than a Cold War relic, the sensing architecture being built to track hypersonic threats from above, the widening circle of allied nations building their own military space capability, and the legal vacuum that continues to surround all of it.
Doctrine Catches Up to Reality
The most consequential development in space militarization over the past eighteen months may not be a satellite or a weapon at all, but a document. On April 3, 2025, the U.S. Space Force signed Space Force Doctrine Document 1, the service’s foundational statement of how it intends to fight, and for the first time gave a formal, public definition to a concept that had previously been discussed mostly in classified settings: space control.
The doctrine defines space control as consisting of offensive and defensive actions, termed counterspace operations, organised across three mission areas: orbital warfare, meaning combat operations conducted through the physical manoeuvre and positioning of spacecraft themselves; electromagnetic warfare, meaning combat conducted across the radio-frequency link between a satellite and the ground; and cyberspace warfare, meaning combat conducted against the computer networks and software that operate space systems. The document goes further than definitions, listing more than a dozen specific categories of counterspace operation the Space Force now formally recognises, including orbital pursuit (manoeuvring a spacecraft close to an adversary’s before employing a weapon), standoff strike (long-range fires against a satellite that never require getting close to it), attacks on the ground facilities an adversary needs to operate its space systems, and escort, the dedicated protection of a friendly satellite using space-to-space capability.
Central to the doctrine is a concept the Space Force calls Competitive Endurance, an explicit acknowledgment that the United States expects to remain locked in sustained, ongoing space competition rather than winning a decisive, one-time advantage, and that operations should avoid generating long-lived orbital debris wherever possible, a notable self-imposed constraint given how destructive a kinetic anti-satellite strike can be to the broader orbital environment shared by every spacefaring nation, including the attacker.
Institutionally, U.S. Space Command (USSPACECOM) has designated fiscal year 2026 its “Year of Integration,” according to testimony its commander, General Stephen Whiting, delivered to Congress in March 2026. A central piece of that effort is building a joint operational plan for what Whiting has termed orbital warfare together with the closest U.S. allies, work that runs through the multinational Operation Olympic Defender partnership, originally formed in 2013 and expanded in 2024, which today includes the United States, United Kingdom, Australia, Canada, Germany, France, and New Zealand. Whiting told Breaking Defense in May 2026 that the concept of operations should be finished by the end of the year, with integration into NATO exercises planned for fiscal 2027. That timeline matters, because it marks the first time this group of allies has formally worked toward a shared plan for how they would collectively fight, rather than merely operate, in space.
The Counter-Space Toolkit: What China and Russia Are Actually Doing
Doctrine only matters if there is a threat to write it against, and the past two years have supplied American and allied space officials with a steady stream of specific, named examples.
The most widely discussed is what U.S. Space Force officials have called satellite “dogfighting.” Then-Vice Chief of Space Operations General Michael Guetlein told a defence conference in March 2025 that the service had observed “five different objects in space manoeuvring in and out and around each other, in synchronicity and in control,” describing it as adversary satellites “practicing tactics, techniques and procedures to do on-orbit space operations from one satellite to another.” A Space Force spokesperson subsequently confirmed the demonstration was Chinese, involving three Shiyan-24C experimental satellites and two Shijian-6 05A/B spacecraft, conducted in low Earth orbit across 2023 and into 2024 and observed using commercially available tracking data. Some independent space analysts have pushed back on the “dogfighting” characterisation itself, noting that close-formation manoeuvring alone does not confirm hostile intent and that China maintains the satellites serve scientific and technology-demonstration purposes, a reminder that much of this domain is read through inference from tracking data rather than direct confirmation.
That episode sits within a broader and better-documented Chinese counterspace portfolio. Beijing has tested at least two direct-ascent anti-satellite missiles, the SC-19 and the larger DN-2, ground-launched interceptors designed to physically destroy a target satellite on a single pass rather than loiter in orbit. China has also fielded the HQ-29, a ground-based system that entered service in 2025 and is understood to be dual-purpose, capable of both anti-ballistic-missile and anti-satellite engagements at altitude. Perhaps most significant for the long term is China’s growing family of satellites equipped with robotic arms, beginning with Shijian-17, launched in 2016, which then-U.S. Space Command chief General James Dickinson warned Congress in 2021 could be used “for grappling other satellites,” and continuing through later Shijian-series spacecraft, technology with obvious civilian utility for debris removal and satellite servicing that carries an equally obvious dual-use potential for disabling or relocating an adversary’s satellite without a single shot being fired.
Russia’s counterspace record over the same period has centred on a single, closely watched spacecraft: Cosmos-2553, launched from Plesetsk on February 5, 2022, just weeks before the invasion of Ukraine. U.S. officials, briefing Congress in 2024, identified the satellite as a testbed for components of a nuclear-armed anti-satellite weapon, a system reportedly intended to generate a powerful electromagnetic pulse or radiation effect capable of disabling or destroying large numbers of satellites simultaneously, including proliferated constellations like Starlink, rather than targeting a single spacecraft as a conventional kinetic weapon would. Russia has consistently denied the programme exists and describes Cosmos-2553’s mission as radiation-hardness testing for its onboard electronics. The story took an unexpected turn in 2025, when tracking data from the commercial firms LeoLabs and Slingshot Aerospace indicated the satellite had begun tumbling erratically, with the Center for Strategic and International Studies concluding in its April 2025 Space Threat Assessment that the observation “strongly suggests the satellite is no longer operational,” a potential, though unconfirmed, setback to the programme. Separately, Russia has continued more conventional forms of orbital shadowing: Cosmos-2588, launched in May 2025, was observed trailing a U.S. reconnaissance satellite in what analysts characterised as a rendezvous and proximity operation, echoing an earlier 2019 Russian “nesting doll” satellite demonstration that shadowed American spacecraft in a similar manner. Russia’s only confirmed destructive test remains its November 2021 direct-ascent missile strike on its own defunct Cosmos-1408 satellite, which destroyed the target but scattered thousands of pieces of trackable debris still being catalogued and avoided by other operators years later.
The United States has not confined itself to defence and doctrine alone. The Space Force declared its Meadowlands system operational on June 8, 2026, a mobile, ground-based satellite jammer built by L3Harris that disrupts an adversary satellite’s uplink and downlink communications using electromagnetic beams. Officials have been careful to note that Meadowlands produces reversible, non-destructive effects, denying an adversary’s use of a satellite’s command and data links without physically damaging the spacecraft or generating debris, a distinction that matters both operationally and as a signal of the kind of counterspace posture the U.S. says it intends to pursue.
Golden Dome and the Return of Space-Based Missile Defence
If any single programme captures the scale of the shift now underway, it is Golden Dome, the missile defence architecture President Trump directed in 2025 and which the Space Force has since begun building out, with published cost estimates ranging as high as $175 to $185 billion.
The most consequential and most technically ambitious element of Golden Dome is its Space-Based Interceptor (SBI) programme, which aims to field a proliferated constellation of interceptor satellites in low Earth orbit capable of engaging enemy missiles, including manoeuvring hypersonic glide vehicles, during their boost, midcourse, or glide phases of flight, a concept last pursued seriously, and never fielded, under the Reagan-era Strategic Defense Initiative of the 1980s. In April 2026, the Space Force’s acquisition arm, Space Systems Command, awarded 20 Other Transaction Authority agreements worth a combined $3.2 billion to twelve companies to develop SBI prototypes, with Northrop Grumman announcing in June 2026 that it had been selected to demonstrate orbital interceptor capability in partnership with Apex, targeting an on-orbit demonstration in 2027.
The programme is proceeding through a structured, four-“gate” competitive demonstration process managed by Space Systems Command. General Michael Guetlein, the retired officer serving as Golden Dome’s programme director, told the Space and Missile Defense Symposium in Huntsville in August 2026 that all twelve competing providers had cleared the first gate and were progressing into the second, while cautioning that the Pentagon will not commit to producing an operational interceptor constellation until the demonstration phase proves the concept works. Guetlein has been unusually direct about the programme’s stakes, telling reporters earlier in 2026 that “Golden Dome is real, and it is no longer theoretical,” and acknowledging that secrecy around the programme’s specifics has left the American public without a clear picture of what is actually being built. According to an August 2026 Bloomberg report, the first SBI flight tests are expected to begin in 2027 and continue into 2028, with the Space Force targeting an “initial capability” demonstration in 2028, though the programme’s own documentation indicates genuine intercept demonstrations are not scheduled until June 2029. Guetlein has separately acknowledged that space-based interceptors could still be dropped from Golden Dome’s final architecture if the demonstrated costs prove too high relative to ground- and sea-based alternatives, a caveat worth remembering given how routinely ambitious missile defence programmes have been scaled back once real cost data arrives.
The Sensing Layer Beneath the Interceptors
Space-based interceptors are only as good as the tracking data that cues them, and the second pillar of the current militarization wave is the sensor architecture being built specifically to solve that problem. The Proliferated Warfighter Space Architecture (PWSA), run by the Space Development Agency, is designed around a Transport Layer providing a resilient, low-latency mesh communications backbone and a dedicated Tracking Layer built specifically to detect and follow hypersonic glide vehicles and ballistic missiles from orbit, closing a detection gap that ground-based radar, limited by the curvature of the Earth, cannot cover on its own.
The financial commitment behind PWSA illustrates how central the programme has become to the broader missile-defence picture: the Pentagon has committed roughly $11 billion to the effort since 2020 and plans to spend nearly $35 billion through fiscal year 2029. Contracting activity accelerated through the second half of 2025 and into 2026, with the Space Development Agency awarding $3.5 billion in December 2025 to Lockheed Martin, L3Harris, Northrop Grumman, and Rocket Lab for 72 additional Tracking Layer satellites, followed by a further $1.75 billion in July 2026 for 36 more, explicitly justified as a step toward a functional homeland missile-defence layer before the end of the decade. Progress has not been friction-free: as of March 2026, a portion of the Tranche 1 satellites launched the previous autumn had still not completed on-orbit checkout, an important reminder that proliferated small-satellite constellations still carry real integration risk even as they scale into the hundreds of spacecraft. Future Military Technologies has examined the broader hypersonic threat driving this investment in detail, including the glide-phase detection gap that PWSA’s Tracking Layer is specifically designed to close.
Allies Build Their Own Orbital Capability
Space militarization is no longer a story about two or three great powers alone. A widening circle of American allies is now investing directly in independent or jointly owned military space capability, driven partly by shared threat perception and partly by a desire not to depend entirely on the United States for a domain increasingly central to modern warfighting.
NATO launched its HALO initiative at the alliance’s 2026 Summit Defence Industry Forum in Ankara, a multinational programme intended to build a networked mega-constellation connecting sovereign, nationally owned and controlled military satellites belonging to individual member states, aimed at delivering high-speed communications, intelligence, and missile-tracking capability that no single European member could afford or field alone. Eight allies have joined so far: Canada, Denmark, Finland, Germany, the Netherlands, Norway, Sweden, and Türkiye. Separately, Breaking Defense reported in May 2026 that Australia, France, Germany, and the United Kingdom have each expressed public interest in developing their own counterspace capabilities, a marked shift from a decade ago when public acknowledgment of offensive space capability by any Western nation beyond the United States was rare. The Combined Force Space Component Command, the multinational headquarters that has directed coalition space operations since 2019, already maintains standing coordination links with the Australian, Canadian, and United Kingdom national space operations centres, providing existing institutional plumbing that the new orbital warfare planning effort can build upon rather than starting from nothing.
The Legal Vacuum Around All of It
One consistent thread running beneath every trend described above is the near-total absence of binding international law governing weapons or military conduct in orbit. The 1967 Outer Space Treaty prohibits placing weapons of mass destruction in orbit or on celestial bodies, and the 1963 Limited Nuclear Test Ban Treaty would separately be violated by detonating a nuclear device in space, but neither instrument addresses conventional kinetic anti-satellite weapons, co-orbital inspection or interference systems, electromagnetic jamming, or cyberattacks against satellites, which together make up the overwhelming majority of counterspace activity actually being developed and demonstrated today.
Diplomatic efforts to close that gap have repeatedly stalled. The United Nations Security Council considered and rejected two competing resolutions on the Prevention of an Arms Race in Outer Space (PAROS) in April and May 2024, the first vetoed by Russia, the second, a Russian-sponsored counter-resolution backed by Belarus, China, Nicaragua, North Korea, and Syria, failing to reach the necessary majority after France, the United Kingdom, and the United States exercised their own vetoes. No comparable resolution has advanced further since. In that vacuum, individual nations are left to define their own standards of “responsible behaviour” in orbit largely through unilateral doctrine statements, such as the U.S. Space Force’s own emphasis on debris-minimising, reversible effects over destructive ones, rather than through any binding, verifiable, multilateral agreement. Whether that informal, doctrine-led restraint holds under the pressure of an actual crisis is a question that has not yet been tested.
Commercial Space Becomes Both Asset and Target
The final trend worth noting cuts across every category above: the deepening entanglement of commercial space companies in military space activity, both as capability providers and, increasingly, as potential targets in their own right.
SpaceX’s Starlink constellation has become the paradigm case. Its use by Ukrainian forces for battlefield communications has led Russian officials to describe the network as a legitimate military target, a stance with obvious implications for how any future adversary might view large commercial constellations that also carry military traffic, including the U.S. government’s own military-specific Starshield variant. In the opposite direction, commercial space-tracking firms such as LeoLabs and Slingshot Aerospace have become primary, publicly citable sources for tracking exactly the kind of counterspace activity, China’s satellite manoeuvres, Russia’s Cosmos-2553 tumbling, that used to be the exclusive preserve of classified government sensors. That shift has genuinely changed the public discourse around space militarization: independent analysts and journalists can now verify or challenge government claims about adversary satellite behaviour using commercially available data, adding a layer of transparency, and occasionally scepticism, that did not meaningfully exist a decade ago.
The normalisation of space as a domain
Taken individually, none of the developments described here, a doctrine document, a jamming system, a tumbling Russian satellite, a dozen companies building prototype interceptors, would necessarily constitute a dramatic shift. Taken together, they describe something that genuinely is one: the normalisation of space as a domain where major powers plan, fund, test, and increasingly doctrinally codify the conduct of warfare, rather than treating it as a protected support function sitting above the actual fighting.
The pace of that normalisation is likely to continue rather than plateau. Golden Dome’s space-based interceptors are scheduled for their first flight tests within the next year, with genuine intercept demonstrations to follow by 2029. The Proliferated Warfighter Space Architecture’s Tracking Layer will continue expanding toward the several hundred satellites needed for persistent hypersonic surveillance. USSPACECOM and its closest allies expect to complete their first joint orbital warfare concept of operations before the end of 2026. And neither China’s dual-use robotic satellite programme nor the unresolved status of Russia’s nuclear ASAT effort shows any sign of a slowing pace of development, whatever near-term technical setbacks either may encounter.
What remains conspicuously absent is any binding international framework capable of managing the risks that all of this activity shares in common, chief among them the danger of orbital debris that no single nation’s satellites, however well-defended, can ultimately escape. Space militarization in 2026 is proceeding largely through doctrine, budgets, and demonstrated capability rather than through treaty or negotiated restraint, and every trend surveyed in this piece points toward that pattern deepening, not reversing, over the remainder of the decade.
