Abstract
The war game is a respected tool for commanders' decision-making. Its preparation, execution, and evaluation of results require precise organization and a considerable time commitment. However, the time aspect is a limiting factor in the current dynamic era to a rather objectified evaluation of the variants of operation execution. The article does not describe the process of wargame preparation, it focuses on the execution phase, where it presents the use of a particular simulation system in wargames and under which theoretical conditions the results of combat simulation can be considered valid. It also evaluates the time efficiency of its use in a wargame. It has been experimentally verified that the tested simulation system can be used for a wargame especially in the accelerated simulation mode. The configuration of the computing system was also verified, which allowed a substantial acceleration of the simulation run of the wargame scenario.