In operational settings, healthcare providers are usually supported with food, shelter, transportation, and protection against those who would cause harm.
Sometimes, those support systems fail.
When they fail, your ability to live to help your patients may depend on your skills at Escape, Evasion and Survival.
Survival: A Guide for the Occasional Flyer – Operational Medicine
Survival, Escape and Recovery – USA, USN, USMC, USAF