Space is increasingly considered an operational domain relevant to states’ security, not only because space capabilities benefit multiple economic sectors, thus making space highly strategic, but because some countries have developed a wide range of counter-space technologies (NATO, 2024). Accordingly, national armies have begun urging the development of militarily-relevant space capabilities and the activation of international cooperation over such issue. In fact, the improvement of dual-use, potentially offensive, space technologies evolved as a much faster pace than the elaboration of international space law aiming at regulating the use of space. The Combined Space Operations Initiative (CSpO), involving US, UK, Canada, Australia, Germany, France, New Zealand, Italy, Japan and Norway, is one of the multilateral efforts to face the challenge of a militarised space domain, gathering an ever-increasing amount of spacefaring nations. However, this US-ed cooperation is not unproblematic, both because of some policy inconsistencies that limit the US capability of sharing information on space matters, and because of the inhibitory effect that reliance on the US for space security has on some parts of the European space industry and on EU strategic autonomy.