Today, our society is surrounded by cutting-edge technologies in many areas. The presence of mass information exchange possibilities has an impact on everyday events. At present, the true effectiveness of extending physical space with virtual space remains to be discovered. The development of immersive technologies is still in its infancy, but many people in the world are looking forward to sharing experiences and demonstrating results. Virtual reality is well known, but only few professional writings summarise the topic with all the associated terms and technologies. So let us take a look at what the whole world is talking about, what virtual reality is and its related segments. Nowadays, it is useful to talk about military applications alongside civilian life, and the following will explain why.