Abstract: New Zealand's Defence Technology Agency (DTA) has developed a model to explore new methodologies for modelling warfare. The model, Map-Aware Non-Uniform Automata (MANA), is based on the ideas of complexity science, and is intended to capture at least some of the non-linear dynamics inherent in actual combat. It does so by treating the many intangible aspects of combatant behaviour in terms of simple rules subject to a stochastic process. It is evident by examining the model that even simple rules lead to complex behaviour. The simple nature of the model allows both rapid parameter space exploration and experimentation with co-evolving tactics, yet it has enough sophistication to produce realistic looking behaviours and tactics. This paper discusses the model and its philosophy.