Subterranean Warfare: The Strategic Defense Capability Without Unified Ownership
Military operations require dedicated organizational leadership to unify underground resilience, sensing, and defeat capabilities.
1Fragmented Subterranean Defense Assets
Subterranean warfare capabilities across the defense establishment currently operate without unified leadership. Specialized detection tools, robotic mapping units, and hardened target defeat mechanisms remain siloed across separate defense agencies and service branches. This lack of centralized coordination limits long-term doctrine development and integrated procurement across critical operational domains.
2Surface Asset Vulnerability Realities
During the 2026 conflict, combined ballistic missile and low-cost drone strikes struck American installations across eight Middle Eastern countries. Concentrated surface assets, including Bahrain naval facilities and high-value aircraft in Saudi Arabia, suffered direct damage. These strikes demonstrated that standard air defense systems can become saturated during simultaneous massed attacks.
3Flawed Assumptions on Force Dispersal
Traditional reliance on tactical air superiority, physical hardening, and rapid runway repair failed to counter coordinated drone and missile salvos. High-value strategic assets stationed at forward bases proved vulnerable even outside active combat zones. Billions allocated toward missile interception systems have not matched protective investments for underground critical infrastructure.
4Targeted Undergrounding Priorities
Adversaries like China, Russia, and Iran utilize deep underground complexes to neutralize conventional Western military power. Essential infrastructure that cannot be quickly replaced requires protective subterranean relocation. Key priorities include command centers, communications distribution nodes, munitions reserves, fuel networks, vital repair stations, and high-value aircraft maintenance facilities.
5Limits of Conventional Bunker Busters
The 30,000-pound GBU-57 Massive Ordnance Penetrator reaches targets approximately 200 feet deep depending on specific geology. Deep adversary facilities, such as Iran's Fordow and Isfahan sites, extend beyond 260 to 330 feet beneath solid rock. Consequently, aerial penetrators struggle to achieve complete physical destruction against deeply buried mountain installations.
6Shift Toward Functional Denial
Given structural limits in destroying deep mountain targets directly from the air, strategic focus has shifted to functional denial. Aerial bombardments, such as Operation Midnight Hammer, focused on collapsing tunnel portals and surface support infrastructure. However, sealing facility entrances leaves internal stockpiles, personnel, and machinery potentially intact beneath the surface.
7Underground Damage Assessment Gaps
Confirming the internal status of deeply buried sites without on-site inspectors remains an operational hurdle. Aerial reconnaissance cannot verify whether buried centrifuges or enriched materials survive within intact subterranean chambers. Deploying specialized personnel for verification presents severe operational risks, creating major intelligence gaps regarding adversary capabilities post-strike.
8Autonomous Drilling as Tactical Solutions
Emerging commercial technologies provide alternatives to deploying ground personnel into hostile underground environments. Autonomous vertical and horizontal drilling systems integrated with artificial intelligence can insert diagnostic sensors or explosive payloads directly into deep subterranean facilities. Commercial robotics and tunneling firms offer scalable platforms adaptable for these defense missions.
9Proposed Portfolio Governance Model
Establishing a Direct Reporting Portfolio Manager reporting directly to defense leadership mirrors successful management models used for unmanned systems. This office would direct three operational pillars: Subterranean Resilience, Sensing, and Defeat. Centralized management ensures unified oversight across operational requirements validation, experimentation, specialized testing, and joint field deployments.
10Doctrinal Evolution for Modern Defense
Modern force protection requires treating subterranean resilience and strike operations as core military doctrine rather than isolated special tactics. Protecting domestic economic infrastructure and deployed forces necessitates a comprehensive survivability strategy. Integrating subterranean capabilities ensures long-term operational readiness against adversaries leveraging advanced underground basing systems.