Miles of former Blood Sultanate hills turned into a trap network doubling as an early-warning tripwire.
Team Retribution owns sector four, formerly of The Blood Sultanate — nothing but miles and miles of gently rolling hills — but Carl chose to keep the southern front line back at the existing trenches between sectors three and four, defended by Tran's 102nd Bulwark Battalion. His reasoning: once the Ramp-Up Phase expires, borders lose all meaning and an enemy can advance from anywhere, and it is impossible to guard the whole border at once.
So they turned the open ground into a horror show of traps. The majority likely wouldn't be effective, but Team Retribution will know the instant any of them are disabled, letting them track a large force as it moves in and pivot from a safe depth to meet it.
Miles of gently rolling, empty hills seeded invisibly with traps.
A defense-in-depth tripwire network guarding Team Retribution's southern approach.