Man, no one ever wants to secretly bankroll me.
Though if someone did sent over a pile of gold and he spent it all on province defense that's actually hilarious.
Now consider it is a random province with no actual use.
Niefelheim briefly broke through the siege on his capital, due to a mix of fortune (lammashtas extraordinarily routed my casters early in the battle), Avenger (a 300 hp, high SR, Heroic Tougness Niefel Jarl Prophet in Dominion 10/Cold 3 with a Sword of Quickness), over 100 gems being burnt in questionable summons, and me being negligent with the siege, not wanting to leave too many mages parked there, since I had it under high unrest lockdown and the Irminsul would need specialized tools to kill if it had the right spell set (20 prot, 500 hp, 20% regeneration, and slash/piercing/blunt resistance is no joke, though I now know Niefelheim did not have most of the spells necessary).
Niefelheim had a single turn of recruiting window, during which it split to take two provinces. I then took the capital back the very next turn and destroyed the majority of their forces in the magic phase. Then they did a turn, apparently PD dumped 100 PD on the province their last 17 units were standing, recruited mercenaries, and went AI.
Whoever gave them all that money, if someone did, gave all that money to someone unable to even use it, which is the more hilarious part.