[On the subject of the origins of familiar tropes in the game...from what I've read, Gary, D&D was originally an outgrowth of war games, in which the party was, basically, a small unit of what one could call "commandos" that infiltrated a besieged fortress. Is that accurate? If so, then what's surprising to me is that I can't think of very many adventures ever set in such a situation. That is, while some adventures feature infiltration of fortresses - such as the "Giants" series - few ever feature a beleaguering army outside. I guess it surprises me because of how much potential such a situation has - PCs could either be from the besieging army, or they could be from the within the fortress, trying to make a sally of sorts. I'm just surprised we never saw more adventures about such a situation, given D&D's wargame origins.