Almost no one outside a small group of defence journalists noticed a change in the language rolling out of the Pentagon this week. American officials used the words of caution and even apology over space for years to preserve assets, to be resilient, to ensure communications. Chairman of the Joint Chiefs of Staff Gen. Dan Caine gave it up on Wednesday during the Air, Space and Cyber Conference outside Washington, where he was on the podium. American troops, he said, must be ready to fight and win battles in space and around the Moon. Senior U.S. space officials had already confirmed, for the first time on record, two days earlier that American forces already operate weapons in orbit. That is information no one outside a small group at the Pentagon can say what those guns are or how many are there. The difference is, Washington no longer pretends they don't.

This is no mere rhetorical maneuver. For nearly seven decades, the fiction that space was a sanctuary – governed by a loose 1967 treaty that forbids the use of nuclear weapons in space but provides little coverage for lasers, jammers and grappling satellites enabled each of the major powers to steadily improve the capabilities of their military satellites while asserting that they would never be the first to fire. That myth is now gone.

Future American troops will be "hunted" by artificial-intelligence systems, which Caine intended to target not only his own countrymen but Beijing and Moscow. China's response was within hours. China "upholds the peaceful use of outer space," and it is against militarisation, said Guo Jiakun, spokesperson for the foreign ministry, in response to the reporters' questions a statement China has been using for 10 years, although the reality of the country's military restructuring is quite different.

The Strategic Support Force of the People's Liberation Army was eliminated and re split into three service forces reporting directly to the Central Military Commission in April 2024, with a dedicated service force for space and near space operations. The one organisational decision made during this week's Washington discussions was as important as any word spoken: China has stopped regarding orbital capability as a support function to other services. It's now a warfighting domain of its own, just as the United States Space Force has stated from its inception in 2019. Beijing has already demonstrated the capabilities of dual-use technology. In 2022, its Shijian-21 satellite was used to grapple and tow a defunct BeiDou navigation satellite into a disposal orbit a form of orbital housekeeping, perhaps, but one with little doubt about the effect that the same manoeuvre could have on another satellite.

None of this is happening in isolation and the economics is why it has been accelerating so rapidly. The current value of the global space economy is approximately $600–630 billion, which is a significant increase from 10 years ago and is projected to reach $1 trillion sometime in the early 2030s by most experts. Nearly four-fifths of that comes from commercial activity (broadband constellations, navigation, and Earth observation), while the other fifth comes from government spending this is what drives the military balance.

Almost $80bn a year is spent on government space by the United States alone, about half by NASA's civil programme, and much of the rest by the Space Force and intelligence services. But, China's stated civil space budget is closer to the $14-20 billion range that Washington has, but is growing at a faster rate than most other national space programmes, and supported by a defence budget now estimated by SIPRI at $336 billion, with a real 7.4 per cent increase compared to the previous year.

The selling of commercial products under military products is the real novelty. No other company launched nearly half of all the satellites into orbit last year, raked in nearly $15 billion in space-related revenue, and now operates more than ten million Starlink subscribers, as Ukraine's experience on the battlefield has shown repeatedly this is as much a strategic asset as a commercial one. China is working hard on its own solutions at scale, with two planned mega-constellations, Guowang and Qianfan, both with almost 27,000 satellites between them. China is also on a race with the Moon on two parallel and competitive timelines: the country has scheduled a crewed return to the Moon with its new Long March 10 rocket for 2030, and NASA's own return to the Moon is also on a schedule that has slipped several times and is now expected to fall short of that date by only a few years.

The unwelcome reality is that both Washington and Beijing do not really want this being depicted as an arms race; arms races are open to the scrutiny of the public, to budget battles and arms control pressure neither side would welcome. But that's what's happening and it's happening in an environment where there are virtually no rules in the legal arena. So far, no country has attacked another country's satellite in real, and both countries say they don't want to be the first. Once there are weapons and doctrine has to catch up to them, though, it's a thin reed that intent is.