A highly integrated "mobile ecosystem," equivalent to a colossal mechanical city slowly rolling across the Golden Desert.
One of the very few remnants of closed urban civilization capable of sustainable operation in the wasteland era.
Its existence relies on the plundering, transportation, and closed-loop reuse of natural resources and oases from the old world.
Constructed during the late stage of the old civilization, originally as a mobile fortress for desert expeditionary forces.
Later expanded into a "mobile urban greenhouse" via "vegetation eco-tanks," "subterranean water bladders," and "photovoltaic decks."
Structures include the rolling system (chassis), multi-tier plantation zones, an energy center, and the Lord's High Tower.
The internal oasis system is not naturally grown, but directly plundered from real oases.
Including: water sources, soil, plants, agricultural slaves, ecological facilities, and even entire plots of land uprooted and loaded into the city.
This causes the continuous extinction of oases along its path and the spread of desertification.
The upper levels are driven by diesel/waste-oil engines.
The lower levels are manually driven by "City-Dragging Slaves," known as the "Flesh-Wheel System."
A hybrid structure of fuel and slave-traction.
Possesses the strongest mobile unit groups in the desert.
The main body's armor strength can withstand medium firepower strikes.
Views all static oases and survivors as targets for annexation.
Its movement signifies an ecological war of annexation.
The core power base of "The Rolling King."
Feared and partially relied upon by surrounding wasteland factions due to its complete ecological cycle and military capabilities.
The Rustwheel's route is never published; only dependents can follow it. Those who refuse to submit only see the city pass by and die in the dust.
Known as the "God of the Wheel."
His actual existence is disputed; rumors say he died centuries ago and currently exists as a "collective will of the Flesh-Wheel."
No one has seen his true form; all commands are relayed through "Wheel-God Envoys."
Inside The Rustwheel, he is the absolute symbol of political, ecological, religious, and technological power.
In recent years, The Rolling King has continuously launched low-frequency, high-pressure mobile harassment against the areas surrounding Southditch.
There are multiple records of "fully armed Rustwheel assault convoys driving straight into the foothill areas, crushing slave owners and their fortresses into scrap iron."
PWU outposts, militia sentry posts, and other facilities have been repeatedly crushed by its mobile units.
Male militiamen, if not killed by machine guns or crushed, are usually taken and conscripted into the "City-Dragging Slave" system.
Female militiamen become "breeding supplements" within the ecological cycle chain.
However, The Rustwheel has never moved north; it neither crosses the Great Wilderness Front nor advances into the Ruined Capital Corridor. The reasons are believed to be:
The Legion possesses high-orbital suppression capabilities against it.
There is an "unspoken agreement" between the two, such as The Rustwheel not advancing north and The Legion not purging the south.
Consequently, Southditch has become a territorial buffer zone between The Rustwheel and The Legion, but also the most unfortunate sacrifice zone:
The PWU is harassed by The Rustwheel year-round.
Slave owners are treated as a "mobile resource pool," and slaves are treated as "driving fuel."
Every southward advance of the rolling city signifies the extension of an ecological fault line.
As a result, the entire Southditch area forms the so-called "The Rustline":
Leaving behind hundreds of kilometers of an ecological dead zone after every rolling sweep.
The final destination for the fallen, heretics, and failures.
Once thrown into the traction layer, they are considered outcasts and are never allowed to return to the upper levels.
Children are often warned: "If you disobey, you go down and drag the wheel."
Making up 90% of the total population, they are the functional groups responsible for ecological maintenance, production management, and combat support.
Educated in the "Doctrine of the Gear" from birth.
During the annual "Day of Wheel Ascension," the purest and most obedient chosen from the middle-tier slaves can be promoted to the upper tier.
Granted clearance to access the area of The Rolling King's High Tower.
Regarded as vessels for holy relics, often undergoing ritualistic modifications and decorations.
Rumors say The Rolling King only speaks with the Ascended, or even physically merges with them.
All residents of The Rustwheel do not consider themselves slaves, but rather "components."
Ascending to the upper tier is a glory, and falling to the lower tier is eternal damnation; this is the decree of the Wheel God.
They believe they are born for the wheel, and their ultimate goal is ascension.