Simulation provides the opportunity to learn how to care for patients in complex situations, such as when patients are exposed to high-energy trauma such as motor vehicle accidents. The aim of the study was to describe nurses' perceptions of high-energy trauma care through simulation in prehospital emergency care. The study had a qualitative design. Interviews were conducted with 20 nurses after performing a simulated training series. Data were analyzed using a phenomenographic method. The result indicates that simulation establishes, corrects, and confirms knowledge and skills related to trauma care in prehosp ital emergency settings. Trauma knowledge is readily available in memory and can be quickly retrieved in a future trauma situation.