Modeling and simulation contribute to digitalization of logistics and medical service for Armed Forces and must reflect factors such as flexibility and robustness in a differentiated manner. As a defense technology company with many years of military experience, ESG has new approaches to use medical data to simulate processes of medical support. The aim of the presentation is to briefly outline the existing approaches of logistic simulation and to present an approach for medical service based on a study with the Bundeswehr (KdoSanDstBw). The key question was when and under what conditions the rescue chain will reach its capacity limit in terms of the potential requirements (attack, wounded/illness in an operational environment). The purpose of the study was to provide an orientation and a collection point for future investigations of the estimation of required qualitative and quantitative capabilities for the further development of the concept "Principles for Medical Support of the German Armed Forces in Operations". Objective of the study was to find possible solutions for a national / (multinational) planning of sustainable medical service capabilities and procedures from a national point of view, based on the framework conditions and associated challenges, both in operations as sole capability guarantor and in cooperation with allied (or friendly) nations on the basis of the national medical service capability elements. For this purpose, the capabilities of the medical service elements of the rescue chain currently planned for an operation are analyzed with the help of a parameterizable, valid simulation model, taking into account their essential performance characteristics, the current operational principles and procedures of the German medical service.  The Bundeswehr, ESG and partners have developed a holistic approach to test the medical military rescue chain (process focus) for robustness and sustainability.