During the Siege of Storm’s End, Mace Tyrell’s army feasted in front of the walls instead of trying to take the castle by storm in an attempt to demoralize the defenders, apparently for over a year. Were there any similar siege developments in history? If so, were they any successful?

Oh absolutely. As I’ve talked about before, most sieges ended because of treachery or starvation rather than assault. So conspicuously eating in front of the enemy, promising food to the besieged if they surrendered, etc. were common and useful tactics. In fact, George Orwell writes about their effectiveness during the Spanish Civil War in Homage to Catalonia.