Essential care and health service support capabilities to either return the patient to duty and/or stabilisation to ensure the patient can tolerate evacuation to a definitive care facility outside the theater. It includes modular hospital configurations required to support the theatre (emergency medical services, surgical services, primary care, veterinary services, dental services, preventive medicine, and combat and operational stress control, blood banking services, hospitalization, laboratory and pharmacy services, radiology, medical logistics and other medical specialty capabilities as required).