Iron Bank Debt Collection
The Iron Bank of Braavos is the richest and most powerful financial institution in the known world, dwarfing all the banks of the Nine Free Cities. Its reach and influence are such that when princes default on their debts to lesser banks, the ruined bankers may sell their wives and children into slavery or open their own veins; but when princes fail to repay the Iron Bank, new princes spring up from nowhere and take their thrones. This principle is not merely a threat but a proven mechanism of power, and in A Dance with Dragons, the bank's intervention becomes a pivotal factor in the struggle for the Iron Throne.
The Debt and the Default
The Iron Bank's dispute is with the Iron Throne itself, not with any single king. During Robert Baratheon's reign, the bank lent the crown vast sums. So long as Robert lived, the debts were honored. However, after his death, the Lannister regime, under Queen Regent Cersei and later King Tommen's council, ceased all repayment. This decision, which Jon Snow considers an act of profound folly, is the catalyst for the bank's intervention. As the Braavosi envoy Tycho Nestoris explains to Jon Snow, the debts belong to the Iron Throne, and whosoever sits on that chair must pay them. Since young King Tommen and his counsellors have become obdurate, the bank means to broach the subject with Stannis Baratheon instead.
The Offer to Stannis
Tycho Nestoris arrives at Castle Black in the company of Queen Selyse Baratheon, ostensibly to treat with King Stannis. He is a tall, gaunt man with a thin rope of a beard and a three-tiered hat of purple felt, and he speaks the Common Tongue flawlessly. Jon Snow, recognizing the opportunity, negotiates a deal with the banker. In exchange for the use of three Braavosi ships for a single, hazardous voyage to rescue the free folk at Hardhome, and for a loan of gold to feed the Night's Watch through the coming winter, Jon provides Tycho with horses, provisions, and guides to reach Stannis. The banker makes it clear that if Stannis proves more worthy of the bank's trust than Tommen, the Iron Bank will lend him whatever help he needs. This offer of financial backing could provide Stannis with the coin to buy sellsword companies, bribe lords, and pay, feed, clothe, and arm his men, potentially winning him the war.
The Mechanism of Power
The Iron Bank's power lies not in its gold alone, but in its willingness to use it as a weapon. The bank does not simply demand payment; it actively funds the enemies of those who refuse to pay. As Jon Snow reflects, the Lannisters' refusal to honor Robert's debts was a strategic error of the highest order. If Stannis is not too stiff-necked to accept the bank's terms, the Braavosi will give him all the gold and silver he requires, enough to buy a dozen sellsword companies, to bribe a hundred lords, and to keep his men paid, fed, clothed, and armed. The implication is clear: unless Stannis is lying dead beneath the walls of Winterfell, he may have just won the Iron Throne, not through battle, but through the ledger books of the Iron Bank of Braavos.