SPACECOM Prepares for Cislunar Operations and Defense Against Attacks on Space Ground Segments

U.S. Space Command is fundamentally rearchitecting its operational posture to account for two emerging realities: the expansion of its area of responsibility into cislunar space, and the growing vulnerability of the terrestrial ground segments that control orbital assets. This shift is codified in the newly circulated "Space Warfighting Environment 2040" assessment, which moves the military's focus beyond traditional geosynchronous orbit (GEO) to encompass the vast volume between Earth and the Moon. The document serves as a foundational framework, challenging existing assumptions and forcing military planners to treat space not as an isolated domain, but as a continuous, integrated system where terrestrial anchors are just as critical as the satellites they command.[1][3]

Cislunar space represents a massive volumetric leap for military operations. While geosynchronous orbit sits roughly 35,786 kilometers above the equator, the cislunar sphere extends to approximately 450,000 kilometers, encompassing the Moon and its Lagrange points—positions where the gravitational pull of the Earth and Moon balance out. Operating in this expanded volume introduces severe physical and logistical constraints. Traditional GPS signals degrade rapidly beyond GEO, requiring entirely new architectures for positioning, navigation, and timing (PNT). Without these foundational capabilities, coordinating complex maneuvers or maintaining secure communications across lunar distances becomes nearly impossible.[2][3]

Space domain awareness—the ability to track objects and characterize intent—also becomes exponentially more difficult in the cislunar regime. A sensor network designed to monitor low Earth orbit cannot simply be pointed outward to cover a volume a thousand times larger. The physics of deep space require specialized optical and radar systems capable of detecting faint objects against the glare of the Moon or the vastness of the star field. This requires a fundamental redesign of how the military collects, processes, and disseminates space tracking data.[2][3]

Consequently, organizations like the Mitchell Institute for Aerospace Studies have recommended a dedicated $250 million annual investment and the addition of 200 specialized personnel specifically to develop cislunar infrastructure and doctrine. They warn that failing to act proactively could cede the domain to authoritarian competitors who view the Moon and its surrounding orbits through a strictly territorial lens. Establishing a robust military and logistical presence now is seen as the only viable way to ensure long-term freedom of navigation and prevent the establishment of exclusionary zones in deep space.[2][3]

The civilian sector is simultaneously pushing for deep-space development. The White House's National Cislunar Science & Technology Strategy reinforces the need for resilient, interoperable systems, prioritizing scalable communications that can bridge the gap between Earth-bound operators and lunar-distance assets. This whole-of-government approach views cislunar space as the next major economic frontier, emphasizing that military capabilities must ultimately support and protect peaceful scientific and commercial exploration. Establishing transparent norms of behavior now is seen as critical to preventing the Moon from becoming a contested territorial flashpoint.[3]

However, the expansion into deep space is only half of the 2040 equation. The other half is firmly rooted on Earth. Space Command's assessment highlights a stark reality: an adversary does not need to shoot down a multi-billion-dollar satellite if they can simply sever its terrestrial tether. Ground segments—the antennas, control stations, data processing centers, and fiber-optic links that operate space systems—are often far more accessible and vulnerable than the orbital assets they support. A cyberattack on a control server or a kinetic strike on a transmission dish can render a satellite entirely useless.[1][3]

Targeting a ground station offers significant strategic advantages to an adversary. Most importantly, it avoids the creation of orbital debris. Kinetic anti-satellite (ASAT) weapons generate thousands of pieces of high-speed shrapnel that indiscriminately threaten all spacefaring nations, including the attacker's own assets. By focusing on the terrestrial and link segments, an adversary can achieve the same operational denial without crossing the threshold of environmental catastrophe in orbit. This makes ground-segment attacks a highly probable vector in any future great-power conflict.[3]

To mitigate this terrestrial vulnerability, military planners are emphasizing the rapid development of disaggregated architectures. Rather than relying on a few massive, centralized control nodes that present obvious targets, future networks will distribute command and control across multiple, redundant pathways. If one ground station is compromised, the system can seamlessly route data through alternative commercial or allied antennas. This resilience requires a fundamental shift in how the military procures and integrates space technology, moving away from closed, proprietary systems toward open standards that allow for dynamic rerouting.[1]

This shift toward disaggregation also demands a much broader understanding of the modern battlespace. Space Command operators must now coordinate intimately with U.S. Cyber Command to protect the vulnerable digital links connecting the terrestrial ground stations to the orbital satellites. The electromagnetic spectrum itself becomes a highly contested zone, where sophisticated jamming and signal spoofing can sever the invisible tethers that keep the architecture functioning. Defending this link segment against electronic warfare is just as critical to mission success as defending the physical hardware on the ground or in orbit.[1][3]

Ultimately, securing the future of space operations requires a dual approach. Space Command must extend its protective umbrella outward to the Moon, developing the propulsion, navigation, and sensing technologies required to operate in the cislunar sphere. Simultaneously, it must harden the terrestrial anchors that keep the entire architecture from drifting into the dark. The 2040 warfighting environment will not be defined solely by who has the most advanced satellites, but by who can maintain the unbroken chain of data flowing between the Earth, the Moon, and the void between them.[1][2][3]