The military returned to the former Castle Air Force Base near Atwater on Friday, but it was just a temporary stay.
Medics got a taste of what an emergency evacuation would be like during a training exercise.
The realistic, battle-focused scenario was put together by Global Medic and involved as many as 45 people and four airplanes.
As part of Operation Global Medic, mannequins, standing in for patients, were loaded onto a C-130 cargo plane as participants were trained to transfer and treat the wounded.
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Nationwide, the Air Force Reserve, Air National Guard, Army Reserve, Army National Guard, Navy Reserve and Marine Corps took part in the exercise.