Siege of Tournai is kinda hilarious
So, during HYW, Edward III convinced the Flemish nobility to make him overlord of Flanders; in exchange, Edward would pay the nobility 300,000 pounds of silver in subsidies.
The only issue was that England did not have the money. His annual income was only 30,000 pounds. So, he took some loans and gave the parliament two years to raise money. But even then, he was only able to put together half of the promised sum.
But Edward still rushed to besiege the City of Tournai and called his Flemish underlings arms. He promised them the rest of the money would come during the siege. Edward's goal during the siege was to force the French King, Philip to fight him.
So, two months passed, and Edward ran out of money, because the parliament wasn't able to raise the money. The Flemish army told him that they wouldn't fight until they were paid, which is deeply ironic, because Philip was about to engage Edward in Tournai and give him the battle he longed for. Instead, Edward was forced to make truce with Philip and leave Tournai as a pauper.