Generalization of the model of conflict between two armed groups

The conflicts between armed groups often go on for years. The classical model of such conflicts accounts for the number of participants and for the technology level of the equipment of the groups. Below we extend this model in order to account for events that are present for limited time. As examples we discuss three kinds of such events: inclusion of reserves, presence of epidemics and use of non-conventional weapons. We show that if such events are not handled properly by the leaders of the groups the corresponding group can lose the conflict.