Crawler-placed traps scattered across no-man's-land that survive the bombardment untouched, awaiting enemy contact.
As Carl crosses No Man's Land during The Charge, he notes the gleam of resistant traps glittering across the wasteland, entirely undisturbed by the artillery, poison rocks, grenades, and pulse fire tearing everything else apart. That resilience is the point of the name — they resist the battlefield's own destruction.
Critically, they are all the crawlers' own: the field between the lines has been seeded with the Democratic Sortion's traps, which the charging crawlers can run past safely while any enemy counterattack across the same ground would not.
Glinting trap devices scattered across churned battlefield ground, visibly intact amid rubble and craters.
Crawler-laid ordnance covering no-man's-land against an enemy counterattack.