A method for detecting electromagnetic beams simulating bullets in a military tactical simulation comprising the following steps: - detecting one or more electromagnetic beams affecting one or more areas of a group of monitored areas, each of said areas comprising at least one detector assembly adapted for detecting said one or more electromagnetic beams, said detector assembly comprising: o plural optical sensors coupled to a garment wearable by a user and adapted for detecting electromagnetic beams, each of said plural optical sensors being coupled to a respective light emitter to light it; ∘ at least one storage device adapted for storing data relating to at least the positioning of said sensors; ∘ at least one decoder circuit adapted for decoding coded data in the electromagnetic beams, the coded data in the electromagnetic beams comprising at least information on the type of bullet they simulate; ∘ at least one logic control unit operatively connected to at least said plural optical sensors, to said at least one decoder circuit, to said light emitters, and to said at least one storage device configured for controlling the illumination of said plural optical sensors according to a predetermined lighting coding in accordance with the real effects that the simulated bullets would have in case of a shot hitting the target; - determining the area hit by said electromagnetic beams, - decoding the information contained in said electromagnetic beams to determine at least the type of bullet they simulate; - determining the real effects that said type of simulated bullets would have obtained if they had really hit said area; - lighting at least one portion of said area according to a predetermined lighting coding according to said real effects so that said real effects are optically detectable during the tactical simulation. - detecting one or more electromagnetic beams affecting one or more areas of a group of monitored areas, each of said areas comprising at least one detector assembly adapted for detecting said one or more electromagnetic beams, said detector assembly comprising: o plural optical sensors coupled to a garment wearable by a user and adapted for detecting electromagnetic beams, each of said plural optical sensors being coupled to a respective light emitter to light it; ∘ at least one storage device adapted for storing data relating to at least the positioning of said sensors; ∘ at least one decoder circuit adapted for decoding coded data in the electromagnetic beams, the coded data in the electromagnetic beams comprising at least information on the type of bullet they simulate; ∘ at least one logic control unit operatively connected to at least said plural optical sensors, to said at least one decoder circuit, to said light emitters, and to said at least one storage device configured for controlling the illumination of said plural optical sensors according to a predetermined lighting coding in accordance with the real effects that the simulated bullets would have in case of a shot hitting the target; o plural optical sensors coupled to a garment wearable by a user and adapted for detecting electromagnetic beams, each of said plural optical sensors being coupled to a respective light emitter to light it; ∘ at least one storage device adapted for storing data relating to at least the positioning of said sensors; ∘ at least one decoder circuit adapted for decoding coded data in the electromagnetic beams, the coded data in the electromagnetic beams comprising at least information on the type of bullet they simulate; ∘ at least one logic control unit operatively connected to at least said plural optical sensors, to said at least one decoder circuit, to said light emitters, and to said at least one storage device configured for controlling the illumination of said plural optical sensors according to a predetermined lighting coding in accordance with the real effects that the simulated bullets would have in case of a shot hitting the target; - determining the area hit by said electromagnetic beams, - decoding the information contained in said electromagnetic beams to determine at least the type of bullet they simulate; - determining the real effects that said type of simulated bullets would have obtained if they had really hit said area; - lighting at least one portion of said area according to a predetermined lighting coding according to said real effects so that said real effects are optically detectable during the tactical simulation.