Belmonte runs the oldest banking house in Azantir, and the empire's wars are run on his money. When Gorath puts a legion in the field, the silver that pays it and the grain contracts that feed it are advanced months ahead of any plunder, and someone has to carry that gap. For three generations the house of Belmonte has carried it. The crown borrows against the slave-tribute and loot a campaign is expected to bring home, Belmonte's house puts up the coin now, and the difference between the two is the largest private fortune in the Shacklands.
The lending is the southern mirror of what the Adron banks do in the Middle Sea, and the difference is the whole of Belmonte. Adron writes its heaviest paper against titan bone, the one reserve nobody can mint; Belmonte writes his against conquests nobody has made yet. The house lends in the southern coin, weighed silver by the chestful rather than minted money, and it sits inside the wider southern money system.
The arrangement looks like patriotism and is closer to a wager. Every loan the house holds is secured against ground Gorath has not taken yet. A campaign that conquers as promised repays its bond and more; a campaign that stalls leaves a hole in the book that only the next campaign can fill. So Belmonte does more than profit from the Eternal March. He needs it never to halt. A Gorath at peace is a Gorath whose debts come due against victories that were never won, and the house that lent against them would be the first thing to fall. The man who would be ruined fastest by an outbreak of peace is the one who has financed the war most heavily.
That is why Belmonte is among the quiet weights holding Veramus on his course. The emperor's marshals would unseat him the day he stopped winning; his creditor would be unseated the day he stopped fighting at all. The two pressures point the same direction, and between them the throne has no exit.
The Moon Wilds put a crack in the foundation. Three legions went west under Drauso, paid for on Belmonte's advances, and came home as nothing. The bond against that campaign is a loss the house cannot recover from a jungle that yielded no plunder, and it is the first frontier in a generation to default. Belmonte has not called it in, because there is nothing to call. He needs the next war to be a good one, badly enough that he has thrown his weight behind Esmeraz and the argument that coin, not another doomed march, should choose Gorath's next emperor. If the throne is going to be bought, the man who owns the empire's debt intends to be in the room.