Joint Chiefs of Staff Chair Gen. Dan Caine has directed the U.S. military to expand its readiness posture beyond Earth's orbit, calling for preparations to fight in the contested region between the planet and the moon. Speaking at the Air, Space and Cyber Conference on Wednesday, Caine emphasized the need for the armed forces to be equipped to "fight, endure and win" across a domain that now extends from the seabed to cislunar space.
Caine, who serves as President Trump's principal military adviser, framed the lunar vicinity as a potential battlefield where U.S. dominance cannot be assumed. His remarks come days after Air Force Secretary Troy Meink disclosed that the United States has placed a weapon in orbit to protect American forces. Meink, addressing the same conference on Monday, declined to specify the weapon's type or launch date, but asserted it would ensure that "when we're threatened, we can take care of that."
The Washington Post reported that the new orbital asset could enable U.S. forces to disable an adversary's satellite if that satellite were used to target American troops or space-based systems. The deployment marks a significant shift in U.S. space posture, moving from defensive to potentially offensive capabilities.
In separate remarks to reporters, Lt. Gen. Gregory Gagnon, commander of the Space Force's Combat Forces Command, said the service is actively preparing for conflict beyond Earth's atmosphere, including around the moon, because "humanity is advancing deeper into space." Gagnon pointed to the People's Republic of China as a primary rival, noting that Beijing is "actively pursuing activities" in those regions.
Gagnon also revealed that the Space Force aims to double its size to roughly 25,000 service members over the next five years, a growth that reflects the expanding strategic importance of space. "We have capabilities in the military because we are preparing to defend the nation," he said. "The reason we have the capabilities is to help create deterrence."
The push for a lunar-ready force aligns with broader Pentagon efforts to integrate space into joint warfighting. The recent confirmation of the first orbital weapon deployment underscores the urgency, as does the administration's focus on countering Chinese space ambitions.
Analysts note that cislunar space—the volume between Earth and the moon—is becoming a strategic corridor for navigation, communication, and potential resource extraction. The U.S. military's interest in this region is not purely defensive; it also signals a commitment to maintaining freedom of action in space, a domain that has become increasingly congested and contested.
The expansion of the Space Force and the deployment of offensive capabilities are likely to draw scrutiny from lawmakers and international observers. Some experts argue that weaponizing space could escalate tensions, while others insist that a credible deterrent is necessary to prevent conflict. As the military prepares for operations around the moon, the political and diplomatic implications will be as significant as the technological ones.
For now, the message from the Pentagon's top brass is clear: the United States intends to be prepared for any contingency, from the depths of the ocean to the far side of the lunar surface. Whether that posture deters adversaries or provokes an arms race in space remains an open question, but the direction is set.
