[Lifetime]

The entire Drow culture is not about war. It is about subterfuge, deception, and overwhelming force when nobody's looking.
The Drow houses do not make WAR upon one another. The make calculated RAIDS upon other houses and ensure that nobody remains alive to tell the tale. The send out RAIDING parties to patrol their borders and kill intruders. Most of the time, the Drow are the ones defending their realm from invasions of the surface elves. So they have a violent culture, but not a war-like one. The orcs are warlike, maybe some other minor races, but the Drow most definately prize stealth, deception and speed above taking and holding ground. They are raiders, pirates and bandits, never staying to do battle with stronger forces. There's your answer right there. What happens when they go to war and their weapons desintegrate? They dont! They run and hide, avoiding protracted engagements.