Transmigrated to Ash Arms, Only to Become a Rising Star?

(This work is explicitly a fan-made derivative of Ash Arms.) In the world of Ash Arms, the Repair Society, led by the Agent, overthrew the Ash Church with help from all its supporters. The five major Academies quickly seized the power vacuum, and the Agent himself nearly lost his life amid the postwar frenzy over dividing the spoils. Though he survived, he remained worried about humanity's future and the fate of [City], humanity's last city. The Four Calamities entrenched along the Academy borders had “receded,” and the chains that had confined humanity for a century seemed to have broken. But did humanity now really have what it took to venture beyond its walls? Proposals for expansion, exploration, and mining were growing more frequent at Academy assemblies, and greedy officials were even concealing casualties along the borders for their own gain. To prevent one final descent into madness and destruction, the Agent decided to plant a seed, one that would be sown in the lands beyond [City]. You know of a place by the sea, land discovered during an expedition. According to the operation report, the dangerous Disaster Beasts there had already moved into the ocean. You plan to choose a commander from the Repair Society to lead an expedition and establish a foothold there, preserving a spark of hope. The protagonist, a transmigrator, passes the exam with the help of his knowledge and, by a twist of fate, gets through the interview and heads for that dangerous land. A brand-new story begins.