For this Phase I SBIR proposal, Vcom3D proposes to develop simulated medical treatment devices corresponding to those used by soldiers in Tactical Combat Casualty Care (TC3) training. Each device will be network-enabled to communicate with a host computer and display that is worn by each soldier. In concert with the Armys Live Training Engagement Composition (LTEC) software, these devices will log what medical procedures are performed on casualties during a live training exercise. Based on wound type, severity, and location, and on the timing and type of intervention performed, the system will simulate, log, and display changes in the casualtys health status.All electronics and software will be prototyped as part of Phase I, and a physical representation of at least one device type will be built and tested. Results of an evaluation will inform Phase II goals and plans.