Abstract
Although it is known for a long time, hybrid war taken place in Ukraine under the umbrella of Russian Federation surprised the whole world and produced the greatest worry for humankind’s fate since the World War II. The political and military analysts appreciate if the World War III does not come will at least follow a long time of a new cold war. Remembering the hybrid war is not declared, can be prolonged in time and the adversary is unknown, thus neither the aggressor state, it is hard to settle which are the countermeasures and how should be act when this clever adversary attacks you using hostile propaganda, to the limit of trick and war perfidy (the first is allowed as method of war, the latter is not), influences the political decision-makers by blackmail, military, economic and energetic deterrence or nuclear bombardments and undergoes subversive, clandestine actions and particularly it is hard to predict their consequences.