Mock wars: Yes! We did the same, to the point where we had diplomats and assasins, and it spread across through class-time as well. It even started my entrepreneruial spirit: I packaged up and sold "ammo" (rubber bands set up for maximum power and a small "gun" to shoot them from, tagged with a colour for your team) haha. Of course, that was very much a no-no (you'll get hit in the eye and go blind!) but it was amazingly fun and I'm pretty sure helped us understand tactics far better by applying them in the real world ;)