Military Sci-Fi Story for Sleep

On a dead oceanic shelf, an atmospheric processing station called the Spire has gone silent inside a spreading calcified reef. Three processor cores still regulate breathable chemistry across the shelf colonies, so a four-man salvage detail enters before the sector suffocates or is abandoned.
The Bone Bunkers are not predators that chase soldiers. They grow bunkers, alcoves, medevac niches, supply mouths, and defensive walls where frightened or wounded men will take cover, then vent calming gas and turn bodies into load-bearing structure.
Inside the reef, radio dies, thermal lies, motion reads nothing, and even sound is swallowed by the walls. When a tech steps into a false medevac niche and the route back begins closing cone by cone, the mission shifts from recovery to confirmed loss, with one survivor forced deeper through a place that knows exactly when men need to rest.
This is "The Trojan Bunkers" by Sascha Schmidt

On an ice world where acid runoff steams through the trench lines, a human colony is trying to evacuate eight thousand civilians from a failing hab-dome to a granite mesa. Beneath the frozen shale live the Burrow Tusks: armored subterranean beasts that hunt vibration, crack open exosuits and vehicles, and use the warmth inside human armor, engines, and supply compartments to nest their young. One last engineer is sent into the western trench to plant six thermal charges and collapse the warren long enough for the civilians to escape.
Inside a failing Mark-IV sapper frame, he moves through rising acid water, hollow duckboards, damp fuses, and ground that answers every step with a dead note. The mission begins as a demolition job: plant the charges, sync them to the seismic hammer, break enough tunnels to buy two hours. But the Tusks are not just breaking through the line; they are choosing the machines, routes, and warm compartments that keep the colony alive.
This is "Silent as Stone" by Sascha Schmidt

The White Sheet is an acid-snow permafrost plain where Tower Nine once processed atmospheric nitrogen for a human colony that stopped answering six weeks ago. Around its base, the Scissorbugs have chewed the colony into stripped alloy, resin, tunnels, and mound-work, and a breacher section is sent in to recover the signal core, plant antimatter pins, collapse the geothermal tap, and deny the nest.
The team rappels onto the tower and begins the climb up the east thermal conduit. But the Scissorbugs are no larger than matchsticks, thermally invisible until too close, and the swarm’s rhythm finds the old obedience dampeners in the soldiers’ skulls, and men begin opening vents, attacking their own squad, and reaching for their own seals as if obeying an order.
This is "The White Sheet" by Sascha Schmidt

LZ Red Silo is an ammonia-soaked dead valley where a human colony’s terrain has been overtaken by Blood-Braid groves, buried cysts, acid guano, and nocturnal fliers. A sapper platoon is sent in to clear a two-hundred-meter landing circle for a medical evac shuttle from Research Station Kestrel.
The job looks simple on paper: burn the pillars, cut the stems, grade the ground, and set charges before the shuttle arrives at dawn. But the Blood-Braids answer every tool with another kind of pressure — flame makes them grip harder, machines are crushed from below, severed chunks begin to regrow, and living mucilage clogs respirators from the inside.
Then night opens the crowns. Silent fliers descend from the groves, shear scalps, open neck veins, and keep soldiers alive as blood farms while the roots close the escape route and the filters fail.
This is "Red Silo" by Sascha Schmidt

A once-flourishing farming and refinery colony on a gas giant’s moon has become an expanding infested dead-zone. The enemy threatening the human colonists is not a creature soldiers can simply target and kill.
The soldiers named it Stonegrinder — a massive alien siege organism that moves through cities like living geology. Anything it touches is broken down, separated, and digested into useful nourishment. What the organism cannot use remains behind as petrified grotesque statues of its former living form.
The Stonegrinder does not just kill people. It turns buildings into breeding chambers, seals corridors like throats, digests bodies into raw material, and spreads smaller scouts through vents, shafts, and broken rooms. Once it takes even an inch of colony ground, that ground is lost and wasted forever. Retreat — even tactical retreat — stops being an option when the dead-zone threatens to swallow the colony.
Deep inside the infected hab-stack is Node Seven, a breeding heart large enough to grow another Stonegrinder if it survives.
A breacher cell is sent in with plasma cutters and thermobaric charges to destroy it before the main mass shifts north and swallows the next colony district.
The soldiers are briefed as if they are fighting something half slime, half stone — but the Stonegrinder has many unseen ways to kill.
This is "Retreat is Contamination" by Sascha Schmidt.