I had more than that - a bunch of nests that didn't die over the winters in my house's attic when I bought it, behind the kneewalls. I must have killed thousands of wasps that summer. But then! They left their dirty wasp pheromones everywhere so wasps come back year after year trying to put new nests up. I have never had such a difficult relationship with an animal before. But that was before Argentine ants started attacking... fuck those bastards