So, lets say that you are fortifying a village besieged by a gang (Think Seven Samurai or Magnificent Seven). You have a village to fortify - walls to build, pit traps to dig, choke points to set up and that sort of thing. What is the consensus for what I'd make the players roll?
Leadership isn't quite right, survival might cover the construction of the actual pit traps, but not the best place to put them. The best thing I could think of was a general cunning roll - but there has to be a better solution than that.