The work deals in detail with the plan of attack on Czechoslovakia in 1938 and the specific implementation of the Bruntál operation. It also maps the state of the Czechoslovak army, but also the German army in September 1938. It also exposes some myths regarding the question of whether we should have defended ourselves against German aggression in 1938. In the same way, he tries to objectively refute the exaggerated opinion about the Bruntál operation, which arose as a result of a chain reaction, the beginning of which was the author Miloslav John. Last but not least, it also tries to bring this topic closer to the layman and also to pupils at primary and secondary schools, especially grammar schools.