This attack tactic is use undergrounds as a means of deployments. Huge digging systems may be used for principal arteries and lighter-ones for personnal deployments.
In a scenario worthy of the Zone 51 several arteries would be dug by tunnel boring machines under the city to approach and tinnier veins would be dug toward the surface to deploy commandos in the city's cave system before a surface attacks.
This obviously pose the question of specialized material for personal deployment, but also the minimization of digging systems footprint (sound, vibration, tunnel size), and the underground reconnaissance work to be done upstream.
The need for underground awareness : being able to monitor what is going on deep underground a city.
The infiltration risk : covert agents, saboteurs, night wolves.
The ease for exfiltrations.
Generative art for underground arrival.
Two underground bunkers come to a strong disagreement leading to an underground war. The set is full of advanced technology, like hyperloop high speed trains, underground roads for armed vehicles (4x4), high tech traps and magmatic thermal power plants. As the two bunkers face each other, arteries and veins are dug into the rocks to invade a rival underground stronghold with tank-like vehicles, soldiers and robots.
Once there, the detachment gets trapped and the battle makes so much wave-noise that the surface becomes aware that there is something underground — and then wants to know exactly what happens. Underground, the war gears up all while the leading side tries to ensure no more wave-noise is visible from the surface and is suppressing federal agents investigating what they are doing.
The main actor, who lived all his life underground, comes to an ultimate battle in the magmatic power plant, and dies seeing the blue sky and flying birds for the first time of his life.
