The book "Troop and Operational Psychology in the Field Forces of the Bundeswehr" offers a comprehensive analysis of the psychological aspects that are important for the training and deployment of field forces in the Bundeswehr. It highlights the central role of resilience, which is crucial for the successful execution of missions as a form of psychological resistance. In light of demographic changes and increasing digitalization, the need for a specific resilience concept becomes particularly evident. This manual serves not only as a reference work but also deepens the training content and integrates insights from collaboration with various police authorities. The topics range from psychotraumatology to stress management, as well as the psychology of firearm use and close combat, making it a valuable resource for professionals in the field of security forces.