Frontier is the outer world-band of the System, a vast and politically distributed region whose remoteness makes it both difficult to defend and tempting to sacrifice. It is administered largely by Clan gods, yet its distance from the Core also gives Cato room to seed industry, hide infrastructure, and build an alternative civilization beyond the System’s immediate reach. When Misse Eln finally treats the region as compromised, Frontier becomes the clearest measure of the conflict’s scale: hundreds of worlds are cut off, invaded, evacuated, or left to reconstruct themselves after the old order collapses.

Definition and Strategic Position

Frontier is not a single planet but a broad collection of worlds beyond the Inner Worlds and Core Worlds. Its political importance exceeds its immediate material value. Misse Eln recognizes that most Clan gods administer worlds there, making the region essential to the established distribution of authority, while also judging that its resources could be abandoned with comparatively little loss. This distinction defines Frontier’s vulnerability: it matters enough to control, but not enough for the Core to protect at any cost.

Its distance also creates a communications and logistics problem. After the portals close, many Frontier worlds remain separated by hundreds or even thousands of light-years. Even deep-space communications arrays cannot erase that distance, and worlds that once belonged to a connected System must begin sending slower-than-light manufacturing probes if they are to rebuild contact with their nearest neighbors. The region therefore exists at the edge of both political visibility and technological integration.

Cato’s Expansion into the Frontier

Cato’s presence in Frontier grows through accumulation rather than a single conquest. Exponential growth initially proceeds slowly: he establishes a few drones, a rudimentary solar array, and a hacked-together manufactory on a moon, working with limited mass and inadequate metals. That small industrial base becomes the template for a much larger strategy. Once his Lineages spread across hundreds of worlds, each world develops factories, mines, refineries, solar-panel production, gas-giant atmospheric extraction, and asteroid-based processing of frozen volatiles.

The resulting network makes geographic distance less decisive. Cato cannot move large forces through portals in a meaningful way, but every world can manufacture its own armies and Warframes. A small proportion of each planet’s expanding production is dedicated to weapons, while a larger portion remains capable of rapid conversion between industry and war production. Frontier thus becomes the place where Cato’s dispersed model outperforms the System’s centralized assumptions: industrial capacity, local armies, surveillance, and copied databases allow every world to become a potential extension of his power.

The discovery that Cato’s presence reaches every Inner World intensifies the significance of this earlier Frontier expansion. Goyle surveys world after world and finds signs of Cato’s artifice in the darkness beyond the System’s reach, while the Core Worlds show no comparable evidence. Muar consequently understands that Cato is not merely a skirmisher choosing isolated targets. His presence behaves like a spreading disease, already established throughout the frontier and advancing into regions that the ruling powers considered secure.

The Frontier Shutdown

Misse Eln responds to this discovery by treating Frontier as a containment problem. She cannot purge every compromised Inner World without exposing the failure of the campaign against Cato, but she considers the more distant Frontier worlds expendable. Her decision is not presented as a temporary military withdrawal; it is a redefinition of the region as disposable infrastructure. She cuts the worlds off from the Core, accepting that they will survive only briefly unless Cato intervenes.

The severance is also a political maneuver. Misse presents herself as the System’s chosen agent and claims that the frontier must be rebuilt into something better aligned with the Great Clans. Her map becomes an instrument of authority: with a gesture, the worlds are cut off from the Core, and she reserves the right to expunge any world that reveals Cato’s presence. The promised reconstruction therefore begins as an act of purification and exclusion, not consent or local self-government.

The situation changes again when Misse’s consolidation of power allows Mishkell to be absorbed and the System’s structure to harden around the Core. Cato realizes that the danger is no longer limited to individual worlds being purged. The Inner Worlds, including Heimdall, might be drawn into the Core, while even Frontier could be integrated or fortified against him. What had been a collection of quarrelling groups risks becoming a monolith capable of reorganizing the map itself.

Cato’s Counteroffensive and Evacuation

When the portals across Frontier are closed, Cato interprets the act as an immediate declaration of strategic necessity. He launches Project Exodus while preparing to seize the region. Hundreds of thousands of reports indicate that deities have left their worlds and that quests have been issued to the inhabitants; this is more severe than an ordinary evacuation preceding planetary purification because the entire frontier is being shut down at once.

Cato’s response combines rescue, incapacitation, and occupation. Across Frontier, versions of Cato activate The Phage, saturating the atmosphere with Chill Out and forcing most inhabitants into lassitude while micro-Warframes assemble from the ground and additional forces descend from above. Exterminatus timers appear as worlds register his presence, creating a deadline for digital citizens. Some people relocate, some duplicate themselves across worlds, and others reconcile their divergent instances into single identities while FungusNet reaches peak capacity across more than half a million worlds.

Most Frontier worlds do not require complete mass digitization. Without deities or high-rank elites to resist him, Cato’s forces rapidly clear the dungeons and seize the Nexus buildings. The inhabitants send final signoffs, the portals close, and the worlds return to lightspeed communication. This is both a liberation and a fragmentation: the System’s immediate control is broken, but the worlds are left separated by immense distances and must build their own links over centuries or longer.

The evacuation also extends beyond Frontier itself. Alums escaping the Inner Worlds travel to Hunting Worlds, where digitization pods wait in orbit. Their minds are transmitted through FungusNet to Heimdall because electromagnetic radiation still crosses portal boundaries even when physical matter cannot. Frontier consequently becomes part of a wider emergency corridor, a place through which populations escape the closing structure of the System and enter Cato’s postbiological refuge network.

Consequences and Significance

After the shutdown, Frontier is no longer a peripheral appendage of the System. It becomes the first enormous region to pass through the full sequence of severance, invasion, evacuation, and reconstruction. Cato’s copied database gives each world access to the accumulated technical knowledge of humanity, while the absence of a shared culture beyond endless conflict leaves them unusually open to a new social formation. Their future is not secured by restored central rule but by distributed industry and the slow rebuilding of interstellar connections.

For Misse Eln, the region remains a sacrifice that can be made to preserve the Core. For Cato, it is the proving ground of a competing political and technological order. The contrast is decisive: the System treats distant worlds as recoverable investments or expendable losses, whereas Cato treats them as nodes in a growing network of production, communication, and possible escape. Frontier therefore gives the war its spatial logic. The conflict is not simply over who controls existing worlds, but over whether those worlds remain subordinate components of a centralized System or become the scattered foundations of a System-free reality.