From Nuclear Reactors to Fuel Reserves U.S. Bases Prepare to Survive 90 Days Cut Off from Supply.

The Pentagon is preparing major U.S. military bases to maintain essential operations for at least 90 days without external support under its FORTRESS America initiative. The plan targets vulnerabilities in electricity, fuel, water, and communications that could prevent American forces from deploying or sustaining combat operations during a major conflict. It emphasizes independent power generation, strategic reserves, and the protection of critical military infrastructure.

U.S. Air Force aircraft assembled at Joint Base Elmendorf-Richardson in Alaska illustrate the military infrastructure and operational capabilities that the FORTRESS America initiative aims to sustain during prolonged disruptions to power supplies and logistical support. (Picture source: U.S. Air Force)

The initiative introduces a broader requirement for installation autonomy, extending beyond conventional emergency generators and short-term contingency supplies. Military facilities would need to maintain command functions, aircraft support, and logistical activities despite prolonged interruptions to civilian services. Achieving that objective would require dedicated energy infrastructure, redundant supply chains and sufficient reserves to sustain operational demand.

According to a Fox News report published on October 25, 2026, internal Pentagon documents establish a proposed 90-day autonomy standard for major installations across the continental United States. The broader FORTRESS program was announced by Defense Secretary Pete Hegseth on September 30. An October 6 memorandum subsequently established a dedicated program office responsible for coordinating implementation across five areas, including energy independence, industrial resilience, strategic reserves, installation protection and space communications.

Related News: U.S. Army Picks Nine Bases for Janus Microreactors to Secure Mission Power in High-Tempo Ops

Nuclear Microreactors Could Supply Independent Power to U.S. Bases

Electricity generation forms a central part of the initiative. FORTRESS considers portable nuclear reactors, large-scale battery storage and microgrids capable of isolating military installations from civilian electricity networks. These systems would allow critical facilities to receive locally generated power following a disruption to external transmission infrastructure.

The U.S. Army is already developing nuclear generation capabilities through its Janus program. In August 2026, the service selected five companies for projects at Fort Bragg, Fort Campbell, Fort Hood, Fort Benning and Fort Drum. The agreements provide up to $2.2 billion in milestone-based funding between fiscal years 2027 and 2031, with more than 20 microreactors expected across military installations.

At Fort Drum, the planned reactors are designed to generate less than 20 megawatts of electricity each while occupying an area smaller than five acres. Their architecture incorporates passive safety systems capable of automatically shutting down the reactor without external power or operator intervention. The Army targets September 2028 for its first operational microreactor, although Janus remains a separate program rather than a confirmed FORTRESS deployment.

Fort Benning provides another concrete example. The installation has been paired with Radiant Industries to host three self-contained microreactors intended to supply critical infrastructure. The planned systems would support facilities including Lawson Army Airfield and training installations, reducing dependence on regional electricity distribution during extended outages.

Air Force Microgrids and Cyber Protection Address Infrastructure Vulnerabilities

The Department of the Air Force is pursuing a parallel approach through its Installation Infrastructure Action Plan. Published in 2024, the document requires microgrid installations at 14 Air Force bases and two Space Force bases by fiscal year 2030.

The plan also calls for Energy Resilience Readiness Exercises at 25 installations by fiscal year 2027. Cyber resilience exercises covering information technology and operational technology systems are planned at 25 installations by fiscal year 2030. These activities focus on the electrical and digital infrastructure required to maintain military functions during power failures or cyberattacks.

FORTRESS extends these requirements to installation protection and communications resilience. The October implementation memorandum identifies zero-trust industrial control systems, hardened satellite links and resilient positioning, navigation and timing capabilities among its priorities. These measures are intended to protect military operations against cyber intrusions, electronic interference and disruption of satellite-based services.

Strategic Stockpiles and Alternative Production Support Military Logistics

Beyond electricity, FORTRESS calls for reserves of ammunition, fuel, critical minerals, electronic components, spare parts and medical supplies. Stockpile requirements would be calculated according to operational consumption rates and the time required to replenish individual materials.

For critical defense dependencies, the initiative reportedly requires at least two qualified supply or production pathways. It also incorporates the Civil Reserve Manufacturing Network, intended to prepare civilian factories for defense production through predetermined technical specifications, cybersecurity requirements, and conversion procedures. The Pentagon plans recurring industrial stress tests and mobilization exercises to assess whether these manufacturers can continue production during extended supply disruptions.

Military Base Autonomy Supports Sustained Aircraft and Ground Operations

For U.S. forces, the operational benefit would be the ability to maintain aircraft sortie generation, vehicle maintenance, command activities, and logistical movements when civilian infrastructure becomes unavailable. Independent electricity could sustain airfield systems and maintenance facilities, while fuel and spare-parts reserves would reduce dependence on uninterrupted deliveries.

The initiative reflects concern that a conflict involving China or Russia could extend beyond overseas theaters through cyberattacks, sabotage, or disruption of American infrastructure. Such attacks could delay the deployment of reinforcements, interfere with military production, and reduce the availability of forces supporting NATO or operations in the Indo-Pacific. FORTRESS seeks to limit those effects by preserving critical functions within the United States, although the Pentagon has not established a public implementation deadline for the reported 90-day requirement.

Written By Erwan Halna du Fretay - Defense Analyst, Army Recognition Group
Erwan Halna du Fretay holds a Master’s degree in International Relations and has experience studying conflicts and global arms transfers. His research interests include security and strategic studies, particularly the dynamics of the defense industry, the evolution of military technologies, and the strategic transformation of armed forces.

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