Method for determining tactical actions

A system for determining tactical actions for protecting a reference entity with respect to a plurality of entities in a battlefield environment, the system comprising:

• a calculator that segments the battlefield environment into a plurality of layers around the reference entity, and
• an obtaining unit adapted to obtain data representative of a probability, for each deterrent system, that the considered deterrent system deters an entity in the associated layer, wherein said obtaining unit obtains first kinematic parameters relative to each of said plurality of entities,
• the calculator being further adapted to associate actable deterrent systems with each layer, to provide, for each entity, a level of threat of said entity and to compute a cost function for determining the deterrent systems to be engaged by the reference entity for rendering extremal the cost function, the cost function being a function depending from the level of threat and the obtained data,
• wherein the calculator further computes second kinematic parameters from said first kinematic parameters, for each of said plurality of entities, said second kinematic parameters presenting a monotonic relationship with regards to the level of threat, the calculator further aggregating the second kinematic parameters to obtain a threat level function giving a first level of threat, calibrating the threat level function with a plurality of training instances to obtain a plurality of calibrated threat levels, and computing a second threat level using the first threat level and the calibrated threat levels.