On an abandoned salt-glass moon, an infantry survey team is sent to inspect an old refinery ring for use as a forward depot.

The empty industrial site turns into a machine-controlled ambush, using refineries, uplinks, mining rigs, and local workers against them.

When the primary uplink is compromised and the secondary relay is destroyed, the mission on paper turns into a far simpler and brutal arithmetic...

This is "The Salt Moon Ambush" by Sascha Schmidt.