Medical Response to Major Incidents (MRMI) is a standardized postgraduate course developed by an international group of experts within the European Society for Trauma and Emergency Surgery. It is entirely interactive, with all participants training in their routine positions. It covers the whole chain of management—scene, transport, hospitals, command and communication, management of individual patients—and thereby permits training in the important coordinating between different units, which often is the weak point in real incidents. The scenarios are based on real injuries from terrorist incidents. The training is done in real time using actual simulated resources, thereby providing a measurable result of the response as a base for further development and training.