US has on-orbit space control weapons

October Insight piece: US has on-orbit space control weapons

By Victoria Samson, Chief Director, Space Security and Stability, and Dr. Almudena Azcárate Ortega, Senior Program Analyst, Space Law and Regulation

On Sept. 14, 2026, U.S. Secretary of the Air Force Troy Meink announced that “the United States now has, on-orbit, space-control weapons, capable of defending the joint force against hostile adversaries.” The development and use of counterspace capabilities, particularly by great space powers, is not something new, and has been documented for many years, including in Secure World Foundation’s annual report, Global Counterspace Capabilities: An Open Source Assessment. 

However, what makes Secretary Meink’s announcement notable is the specific choice of wording: “weapons.” This marks the first time that a U.S. official has ever acknowledged the existence of U.S. weapons in space. Before this announcement, the terminology employed was always space systems with the potential for counterspace capabilities.

While the meaning of “on-orbit space control weapons” in this case is not entirely clear, the United States has held a policy for several years under which debris-causing counterspace activities should be eschewed due to the indiscriminate and highly damaging effects that space debris has on space systems, particularly in densely populated orbits like low Earth orbit (LEO). The challenges posed by space debris would make it complicated for U.S. operators — including the United States military— to operate in orbit. In light of this, it is likely that the “weapons” referenced in the announcement are non-kinetic in nature, such as space-based jammers or spoofers. Non-kinetic counterspace capabilities are not new, nor is the United States the only country that possesses them. As detailed in Secure World Foundation’s annual counterspace report, China and Russia are thought to have space-based jammers, so, as highlighted above, what is particularly noteworthy about the announcement is perhaps not that the United States could possess such capabilities, but rather how they were characterized and that it made public their existence.

To give a little bit of insight in terms of what could be meant as a space control weapon, the Space Force’s Doctrine Document 1 from April 2025 describes space control in the following manner: "Space control comprises the activities required to contest and control the space domain. The desired outcome of space control activities is space superiority, a degree of control that allows forces to operate at a time and place of their choosing without prohibitive interference from space or counterspace threats, while also denying the same to an adversary. Space control consists of offensive and defensive actions, referred to as counterspace operations. Three mission areas contribute to space control: orbital warfare, electromagnetic warfare, and cyberspace warfare." 

It is unclear why the United States is acknowledging the existence of these weapons now. It is possible that it is meant to be used to deter hostile activities on orbit by letting adversaries believe that the United States can monitor what they are doing and counter it if need be. It also could be intended to solidify the Space Force as a warfighting branch, as opposed to a military branch that supports other branches. 

In light of this announcement, a key question that arises is whether or not the development and placement of such co-orbital space control weapons is legal under international space law. The 1967 Outer Space Treaty (OST) prohibits the placement, installation, and stationing of nuclear weapons and weapons of mass destruction in orbit, as well as the testing of any type of weapons on celestial bodies. However, it does not prohibit the placement of conventional weapons in orbit. As such, the mere presence of these space control weapons in orbit does not violate the OST.

However, this does not mean that such weapons could be used with impunity under international law. While the OST may not establish any additional explicit arms control limitations for conventional weapons in orbit, its Article III clearly specifies that international law, including the UN Charter, applies to outer space. In virtue of this, the prohibition of the use of force or threat of force that is enshrined in Article 2(4) of the Charter applies to outer space. As such, should the use of a weapon rise to the threshold of that prohibition of use or threat of force, it would be considered a breach of international law.

The problem is that identifying when that threshold has been reached can be a difficult task, especially when States themselves are often hesitant to call out other actors’ activities, and explicitly categorize them as illegal, since such declarations would prevent those States from being able to use those same technologies they have condemned. This is something that was clearly evidenced when different nations tested direct-ascent anti-satellite (DA-ASAT) capabilities over the years: while at times they faced heavy criticism, and States characterized some of those tests as irresponsible, dangerous, and damaging, none expressly deemed them illegal or a breach of the OST or other international law. 

Something similar has happened with the use of jammers against space systems. Due to the reversible and temporary nature of jamming attacks, they have over time become deemed an acceptable risk that space operators (particularly of dual-use and military systems) must bear and build resilience against. While some States call out jamming activities in multilateral fora, deeming them disruptive, they are not seen as illegal, as reaching the aforementioned prohibited threshold of a use or threat of force. They may be considered a harmful interference under Article IX of the OST, but these are not prohibited by the OST, only discouraged. Harmful interference does constitute a violation of the regulations of the International Telecommunications Union (ITU), where it holds a slightly different meaning than it does under the OST. However, military installations exist as an exception outside of this prohibition.

Thus, neither the announcement of the existence of these weapons, nor the weapons themselves, constitute a violation of international space law, but their use against another State could rise to the level of illegality.

Now that the United States has officially acknowledged it possesses weapons systems in space, and has explicitly named them thus, it has opened the door for others, in particular adversaries and near-peer competitors such as China and Russia, to do the same. If so, this in turn may be taken by the United States as the justification for why the United States needed those systems in the first place. 

Another possibility, and perhaps the most likely within the multilateral diplomatic sphere, is that U.S. adversaries may use this announcement as another example of the United States being the bad actor in orbit. For example, China and Russia —who have already criticised the United States’ announcement— have long heavily condemned the United States’ designation of space as a warfighting domain. In this sense, they have indicated that such language veers away from the objectives of space security —seeking to preserve space for peace— and specifically the prevention of an arms race in outer space (PAROS) that States are seeking to achieve in multilateral fora.

Allies and partners of the United States may choose to follow the United States’ example and also openly declare their possession of weapons in orbit. This has in some ways already started: shortly after Meinke’s announcement, the United Kingdom’s Chief of the Air Staff, Air Chief Marshal Sir Harv Smyth, stated that “[t]o help our nation fulfill the control of space requirement, UK defence is now developing capabilities for orbital warfare.” This could further destabilize the current geopolitical climate, normalize these systems being in orbit, and serve to stoke the flames of a security dilemma.

Alternatively, certain allies may choose to distance themselves from the United States' rhetoric, something that was to a certain extent already perceived at the Paris International Space Summit on Sept. 9-10, 2026, where the language used by the officials in attendance highlighted a desire to build European strategic autonomy and reduce dependency on foreign entities, creating clear tension with the United States' approach to maintaining space superiority. While European officials carefully avoided aggressive anti-U.S. language, the political context and policy rollouts heavily emphasized distancing Europe from American corporate and political dominance. Moreover, at the International Astronautical Congress (IAC) held earlier this month in Antalya, Türkiye, President Recep Tayyip Erdoğan condemned the announcement by the United States, indicating that the placement of weapons in orbit constitutes “a direct threat to the joint future for humanity.” This is the first condemnation of space weapons by a NATO leader after the United States issued its announcement.

The announcement by Secretary Meink marks the culmination of a significant shift in U.S. policy that has been underway for around a decade, and which has picked up particularly quickly in the past two years. The United States has gone from not wanting to acknowledge even the slightest interest in the development and use of counterspace capabilities, to arguing for the need for what it called “orbital fires,” to now acknowledging that it has weapons in space. 

Ultimately, this is destabilizing for the United States itself, having enmeshed space capabilities into every aspect of how its society functions, particularly how its military carries out national security missions. Normalizing weapons in orbit opens the possibility of conflict breaking out in space, which means that the United States has inadvertently set the precedent for actions that could harm both U.S. national and global stability.