ATS Expansion Pack 6- Killing Fields continues the series of expansions for the first ATS series boxed game Advanced Tobruk. Ownership of that game and American Personnel and Vehicle counters are required to play the scenarios included in the set. Killing Fields adds new vehicles and overlays to the system including a 22" long escarpment overlay. The thirteen scenarios included represent WWII actions in North Africa with the Americans, British, Germans, and Italians. ATS is a tactical level wargame system with each turn representing about 90 seconds of real time and each hex representing 50 yards of terrain. Each weapon and vehicle counter represents one weapon or vehicle. Personnel counters represent squads, crews, forward observers, BAR gunners, and leaders.