Keep copies for yourself so that you will be able to help the next person. A marine's training is often inherently dangerous but every effort should be made to ensure a minimum of injuries. Trust your instincts on safety. If it looks unsafe, it probably is. Think fire safety and carbon monoxide poisoning if heaters are in use.
Vehicle accidents cause the majority of serious injuries in the field and on deployment.
Be prepared for a medical response to a vehicular accident and aggressively enforce vehicle safety. Remember that you have a lot of clout in the battalion, so don't be afraid to use it if something is unsafe. This will allow you to better tailor your medical plan to the needs of the exercise. This may be important in an emergency. This goes beyond just being a doctor.