In face of challenges related to designing safe CBRN training activities, virtual reality (VR) can resolve many problems. VR, as a viable learning environment, allows trained personnel to perform activities which are burdened with a risk of accidents or harms. Teaching CBRN detection, which involves creating adverse conditions, can also be performed in such an environment. Often, the mixture of VR and augmented reality (AR) brings outstanding effects. For instance, switching additional elements in googles may provide more information about a detected substance. This combination of new technologies elements can allow for early error detection, is conducive to maintaining the proper pace of the task, and leads to a successful task accomplishment. Apart from early errors detection, a virtual learning environment allows for learning by own mistakes. It means that a learner can enter by accident the contaminated zone and perform a task without any negative consequences. Such a dangerous zone, in fact, is only a digital projection, therefore it is safe. If the task is designed in a realistic way and the level of immersion is high, it can cause emotional arousal which makes the whole learning experience more appealing and realistic. All training based on scenarios can be adjusted to current needs and its designs are limited barely by the imagination of a training system’s designer. More details and general ideas about the use of VR in military training can be found in the article on 3D Army http://polska-zbrojna.pl/home/articleshow/33123?title=Army-3D#