Pentagon's Fortress Plan Aims to Keep US Bases Running for 90 Days

The Pentagon preparing for a nightmare scenario, a global war that could knock out power grids, cripple supply chains, and leave military bases cut off from essential services.

Our chief national security correspondent, Jennifer Griffin, reports live in Washington.

Uh, this is getting a lot of play online, Jennifer.

That's right, John. Well, the Pentagon has a doomsday plane, and now it's updating its doomsday plan, moving beyond its Cold War-era continuity of government planning, which called for key military leaders to retreat to hardened facilities in Cheyenne Mountain in the event of an incoming nuclear attack.

Now, the Pentagon sees a new nightmare scenario, a global war that knocks out America's power grids, cripples supply chains, and leaves US military bases cut off from essential services.

Other allies, including the UK, have been warning their populations to stockpile 90 days of food and water just in case.

Under the new Pentagon initiative, called Fortress, every major military installation in the continental US would be expected to operate independently for at least 90 days with its own electricity, water, fuel, and communications.

Documents obtained by Fox reveal plans for portable nuclear reactors, backup power grids, and massive reserves of ammunition, critical minerals, medical supplies, and spare parts.

The Pentagon also wants civilian factories ready to switch to wartime weapons production, alternative supply chains in place if foreign suppliers are cut off, and military communications capable of functioning even if GPS and satellites are disrupted.

Experts agree America's next major war could reach US soil through cyberattacks, drones, and long-range weapons, particularly in a potential conflict with China, which appears to be preparing the battlefield by targeting US critical infrastructure through ongoing cyberattacks like Salt and Volt Typhoon.