The United States military must radically prepare to project power and engage adversaries far beyond traditional terrestrial boundaries, according to the nation’s highest-ranking military officer. Speaking at the Air & Space Forces Association’s Air, Space & Cyber Conference in National Harbor, Maryland, Chairman of the Joint Chiefs of Staff Gen. Dan Caine delivered a stark assessment of modern security dynamics, asserting that contemporary military operations now span from the ocean floor to the farthest reaches of cislunar space.
Gen. Caine’s remarks underscore a fundamental shift in global defense strategy. As geopolitical competition expands outward from Earth, cislunar space—the vast region encompassing Earth’s orbit, the moon, and the lunar surface—is rapidly transitioning from a scientific frontier into a contested operational domain. Military planners, intelligence analysts, and defense contractors are increasingly treating the moon and its surrounding orbital pathways as strategic terrain that will dictate global power balances in the coming decades.
The Evolution of the Modern Battlefield
For decades, the concept of a multi-domain battlefield was largely confined to land, sea, air, cyberspace, and low-Earth orbit. However, technological advancements, falling launch costs, and the commercialization of space have compressed the distance between Earth and deep space. Cislunar space, stretching roughly 240,000 miles from Earth to the lunar sphere, introduces unprecedented logistical, technological, and tactical challenges for modern armed forces.
During his keynote address, Gen. Caine emphasized that future conflicts will unfold in environments where the U.S. military can no longer take uncontested access, secure rear areas, or uninterrupted supply chains for granted.
"Future conflicts will demand that we operate without the assumptions of uncontested access, secure rare areas or uninterrupted or uncontested sustainment," Caine told the audience. "Our task, my friends, is to adapt right now, so the joint force is prepared to fight, endure and win in global contested environments, from the seabed to cislunar space."
While the general did not explicitly single out specific nations during his speech, defense analysts note that his warnings directly reflect escalating competition with peer adversaries, particularly China and Russia, both of which have rapidly advanced their counterspace and deep-space exploration capabilities.
The Strategic Importance of the Lunar South Pole
The pivot toward cislunar defense is driven largely by renewed international interest in the moon—specifically its polar regions. Both the United States, through NASA’s Artemis program, and China, through its Chang’e lunar exploration initiative, have targeted the moon’s south pole for sustained exploration and eventual base-building.
The primary attraction of the lunar south pole is the presence of vast reserves of water ice trapped within permanently shadowed craters. Water is not only essential for supporting long-term human habitation on the lunar surface, but it can also be split into hydrogen and oxygen to produce rocket propellant. This capability effectively transforms the moon into an interplanetary refueling station, granting strategic mobility to whichever nation controls or secures access to these resources.
Furthermore, space policy experts emphasize that early establishment of presence on the lunar surface will set the de facto rules, norms, and precedents for behavior in deep space. Winning the modern moon race is therefore viewed by U.S. officials as critical to preventing adversarial dominance over vital orbital trade routes and communication relays.
A Chronology of Lunar Milestones and Strategic Awakening
To understand the urgency behind Gen. Caine’s warnings, it is necessary to examine the rapid pace of lunar exploration over the past decade, which has startled Western defense analysts:
- January 2019: China achieves a historic global milestone by landing the robotic Chang’e 4 spacecraft on the mysterious, heavily cratered far side of the moon, a feat never before accomplished due to communications blackout challenges.
- November 2020: The United States and seven partner nations sign the Artemis Accords, establishing a set of principles for cooperation in the civil exploration and use of the moon, Mars, and other celestial bodies.
- December 2020: China’s Chang’e 5 mission successfully returns fresh lunar samples to Earth, demonstrating automated docking and sample-return capabilities from lunar orbit.
- June 2024: China executes the groundbreaking Chang’e 6 mission, successfully landing on the lunar far side, collecting subsurface samples, and returning them to Earth—strengthening Beijing’s technical prowess in deep space operations.
- September 2025: Defense officials increasingly highlight vulnerabilities in satellite networks, prompting heightened calls for defensive architectures spanning Earth-Moon Lagrange points.
- September 2026: Speaking at the Air, Space & Cyber Conference, top Pentagon and Space Force leadership publicly confirm the deployment of orbital defensive capabilities and the imperative of securing cislunar lines of communication.
The Role of the U.S. Space Force and Orbital Defense
The operational burden of safeguarding these extended frontiers falls heavily on the United States Space Force. Established in December 2019, the branch is tasked with protecting U.S. and allied interests in space, ensuring space superiority, and maintaining the continuous flow of data and communications required by joint forces globally.
Gen. Caine reiterated the indispensable nature of the Space Force during his conference address, stressing that the nation must retain the capability to project power globally while securing the network architecture that underpins modern warfare.
"We must continue to ensure that the United States of America can strike anywhere on the globe at the time and place of our choosing, and sustain that force," Caine stated. "Our United States Space Force must provide unrivaled space superiority and sustain the associated networks, domain awareness and data advantage that the joint force needs to win in space, both now and in the future."
The strategy for maintaining this superiority took a significant public turn during the same conference when Gen. Douglas Schiess, head of the Space Force’s operational commands, acknowledged a reality previously discussed only behind closed doors: Guardians are actively operating weapons systems deployed directly in Earth orbit.
"Let me be crystal clear: Today, guardians operate on-orbit weapons that can defend the joint force against space-enabled attacks," Schiess announced during his address on September 15, 2026.
While Schiess did not elaborate on specific hardware specifications, defense experts deduce that these orbital assets are predominantly electromagnetic or electronic warfare systems rather than kinetic projectile weapons. The distinction is vital; kinetic anti-satellite (ASAT) weapons—such as those tested in the past by various global powers—shatter target satellites into thousands of high-speed shrapnel pieces, creating catastrophic debris fields that threaten all orbital infrastructure indiscriminately. Electromagnetic jammers, lasers, and blinding mechanisms offer a more surgical approach, neutralizing an adversary’s space-based reconnaissance or communications capabilities without permanently littering Earth orbit with hazardous debris.
The Global Counterspace Landscape
The public acknowledgment of orbital weapons by the United States highlights a broader, highly competitive global arms race taking place quietly above the atmosphere. Major spacefaring nations have spent years developing sophisticated counterspace technologies designed to deny, disrupt, or destroy adversary assets during a conflict.
Russia and China have both demonstrated advanced counterspace capabilities. Past kinetic ASAT tests conducted by Moscow and Beijing—where defunct satellites were intentionally destroyed by ground-launched missiles—drew sharp international condemnation due to the massive debris clouds generated. Additionally, both nations have deployed maneuverable "inspector" satellites capable of tracking, approaching, and potentially tampering with foreign spacecraft in geosynchronous and low-Earth orbits.
As these capabilities mature and extend further outward toward the moon, the risk of miscalculation in space grows exponentially. Unlike terrestrial conflicts, where borders and frontlines are clearly demarcated, space is characterized by high speeds, orbital mechanics that dictate predictable flight paths, and a complete absence of physical barriers between friendly and hostile hardware.
Broader Impact and Strategic Implications
The integration of cislunar space into military doctrine marks a paradigm shift that will shape defense budgets, aerospace engineering, and international law for generations.
From an economic perspective, the militarization of cislunar space will likely trigger a massive influx of defense funding directed toward deep-space situational awareness, automated orbital robotics, resilient communications relays, and nuclear thermal propulsion systems capable of transiting between Earth and lunar orbits rapidly.
From a diplomatic standpoint, the lack of robust international treaties governing military activities on the moon or in cislunar space creates a dangerous regulatory vacuum. While the 1967 Outer Space Treaty prohibits the placement of weapons of mass destruction in orbit or on celestial bodies, it contains significant ambiguities regarding conventional defensive weapons, military installations, and resource extraction rights. Without updated multilateral frameworks, the rush to secure strategic points on the lunar surface could increase the risk of inadvertent escalation between major global powers.
Ultimately, the message delivered by Gen. Caine and his military colleagues at the National Harbor conference is clear: the era in which space could be treated as a sanctuary exclusively for science and commerce has officially ended. As humanity reaches outward toward the moon, military competition is following closely behind, ensuring that the future security of nations will be decided not just on land, sea, and air, but across the entire expanse of the cislunar void.
