Thunderstorm Spiral” — Pentagon Trains for Underground War/Disaster in Megacities

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Top Tier Gear USA


As populations move into cities across the globe, an increasing majority of people will live in urban areas – places which quickly become very desperate and vulnerable during a major crisis.

Every prepper knows the dangers of being stuck in a major metropolitan city in the event of a major hurricane, a grid-down scenario or civil unrest and societal collapse.

In such a situation, as every prepper knows, food, water and other vital resources will quickly become scarce or unavailable. A gridlock of survivors will try to get out, or get their hands on assets.

Increasingly, the Pentagon is looking at the likelihood – perhaps the inevitability – of war/conflict inside of a destabilized or decimated megacity urban center like New York.

According to the Daily Mail:

The Pentagon is calling for help from technological innovators to take on the future of warfare.

In the program titled ‘Thunderstorm Spiral,’ the US government solicits demonstrations to tackle the challenges of megacities and underground environments, which will become increasingly prevalent as populations continue to grow.


A megacity is defined as a city with more than 10 million residents. To put this in perspective, there are currently over 8 million people living in New York City.

As these numbers continue to grow within defined areas, infrastructure will have to adapt, pushing megacities toward the development of subterranean – or underground – environments.

In 2014, there were 23 megacities with ‘vast subterranean structures’; in 2025, it’s expected this number will reach 37.

To meet these needs, the Deputy Assistant Secretary of Defense for Emerging Capability and Prototyping, Rapid Reaction Technology Office (RRTO) Technology Demonstration Program is sponsoring the request for information (RFI) issued by the Pentagon.

‘As the world’s population grows, the probability of the U.S. needing to conduct combat and humanitarian assistance / disaster relief (HA/DR) operations within a megacity (defined as a city with more than 10 million residents) also grows,’ the solicitation states.


The ‘desired capabilities’ in focus of the program include GPS techniques for underground and dense urban environments along with intelligence, surveillance, and reconnaissance sensors for use in tunnels.

As major American, Asian and European cities grow with extreme rapidity, urban planners have been expanding large underground facilities. Increasingly, it is not just subway systems, but shopping malls, parking lots, utilities and perhaps even residential units that are being built underground.

While this may be practical to facilitate crowded above-ground conditions, it brings new dangers for populations who could be trapped underneath in the event of a bombing, terrorist attack or major natural disaster.

Inadequate design to accommodate flooding and allow evacuation for people underground is perhaps the biggest threat facing these quickly expanding facilities.

The United Nations University has studied many of the disaster scenarios that could occur in underground spaces, noting the rapid growth of underground facilities in mega-urban areas across the world:

The rapid and extensive underground expansion of mega-cities – for subways, malls, parking and public utilities – takes place often with too little knowledge of associated risks and too few plans to minimize the effects of a natural disaster, United Nations University experts warn.

With growing land pressures in cities (which contain about 50% of all people today, seen rising to 65% by 2030), creating new space underground becomes increasingly attractive. In many places, however, studies of potential natural disaster risks are often neglected, says Srikantha Herath, UNU Senior Academic Programme Officer.

While many underground shelters can withstand earthquakes and other disruptions, flooding stands as one of the biggest and untested underground disasters cities may face in the near future:

Modeling a variety of catastrophic events is essential for building contingencies into underground infrastructure designs, including evacuations and the emergency containment and transport of flood waters, for example.”

Via underground interconnections, water can travel considerable distances away from the flood source. However, there are often no subsurface maps; underground space is usually mapped in relation to a building overhead.

Strategic relocation expert Joel Skousen and other prepping experts have warned against allowing yourself to be trapped in a major city – particularly on the East Coast – where evacuation may be nigh impossible. Being trapped underground in such a megacity only adds another layer of disaster to that recipe.

If you have your own underground structure, make sure that its design has accounted for flooding, because the possibilities are all too real.

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  • This would be a more interesting article if it took into consideration the greater urban sprawl of the dozen largest greater cities in the country, many of which dwarf NYC in total population. It takes a great deal of definition and analysis, probably the reason why it wasn’t addressed.

  • Publeus

    ‘As the world’s population grows, the probability of the U.S. needing to conduct ***COMBAT*** and humanitarian assistance / disaster relief (HA/DR) operations within a megacity…’

    — That’s a point blank threat of waging war upon the United States. Slipping it in with Humanitarian doesn’t change the note of TREASON. Waging COMBAT upon any U.S. city would be TREASON against the U.S.


    • ExecutorOffice
      • Publeus

        — Yeah. The Civil War was lost to Britain. England in the North, Scotland in the South. They played both ends against the middle, as they are wont to do.

        Check out the original Thirteenth Amendment…

        U.S. Constitution 13th Amendment

        “If any citizen of the United States shall accept, claim, receive, or retain any title of nobility or honour, or shall without the consent of Congress, accept and retain any present, pension, office, or emolument of any kind whatever, from any Emperor, King, Prince, or foreign Power, such person shall cease to be a citizen of the United States, and shall be incapable of holding any office of trust or profit under them, or either of them.”

        Attornies. BAR.

        Now the illegal replacement…

        U.S. Constitution 13th Amendment (Revised)

        Section 1. Neither slavery nor involuntary servitude, EXCEPT as a punishment for crime whereof the party shall have been duly CONVICTED, shall exist within the United States, or any place subject to their jurisdiction.

        Section 2. Congress shall have power to enforce this article by appropriate legislation.[

        I wish that war was about slavery. Slavery is legal. No State may ban that slavery. Our history was stolen. We are chained.

        Kneel before your Queen…

        • ExecutorOffice

          Queen Michelle, and Obongo

          • Publeus

            — Puppet show, of a puppet show, of a puppet show…

        • ExecutorOffice

          Nice use of the word ‘ wont’ .

          • I hope that you know that there is a difference between wont and won’t.

          • ExecutorOffice


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  • hamartia

    Won’t they will simply destroy the troublesome city as an example? Then, blame it on a guy in a cave?

  • FollowDaMoney

    You need to relocate now. Move to your favorite hiding in plain sight location and find a job. Even if you start by renting an apartment in some small town off the beaten path. Get to know you neighbors and watch the local papers, websites for small acreages to become available. I call it rent to purchase something better. Most of the time in out of the way places rents start at about $350 for multi-room rentals. I just saw a local 2 bedroom duplex with basement and garage close to schools for $450. This allows you to spend all the resources you are allocating for bugging out to bugging in. Once you move rural if something happens all you need to do is top off your water, make popcorn, sit back, and watch the show.

    Locations that people over look are rural locations in IA, KS, MO, NE, and even North and South Dakota.

    • It won’t make any difference where you move to if electrical power, water, food, and money are important to you. The only exception is if you can live like the native americans did 250 years ago, there. Native americans didn’t have jobs in those days…

      • FollowDaMoney

        If you have skills you will always have a job. Most city folk will be in trouble. They hung their hat on the government and will live or die by the government. Look at what happened to Flint’s water supply. Their screw up may take years to fix. If something bad happens the government will hang us all out to dry.