I suspect the first picture, which strongly resembles a
Voronoi diagram, might be something electrical, like an antenna. Odd shape to compensate for the local geomagnetic field? Not DSMAC-related. I once saw a complicated microwave waveguide network for a comsat which had a similar, irregular appearance. Apparently it was shaped to match the topography and intended radiation pattern on the ground. But something this big would be for very low freqs. Submarine comms like
Sanguine? About 1 mile per side, full wave antenna, ~186 kHz.
There is also an 18-mile long rectangular grid array in another location which looks like it has power supply lines and delay loops (if the cables follow the vehicle tracks), suggesting a big phased array. Another square array resembles
HAARP.
Induced lightning strikes by targeted ionization? That might explain the blast craters and blown-up vehicles.
There's also a nuke plant nearby, you can see the hyperboloidal cooling towers.