A CH-47 Chinook helicopter lands in support of a casualty evacuation exercise at Fort Eustis, Va., March 3, 2016. The 159th Aviation Regiment, 5th Battalion Chinook crew supported the 558th Transportation Company by providing evacuation transport. (U.S. Air Force photo by Staff Sgt. Natasha Stannard)

U.S. Army Soldiers with the 558th Transportation Company provide security for members of their team during a casualty evacuation exercise at Fort Eustis, Va., March 3, 2016. The company practiced securing the perimeter to enable safe treatment of casualties. (U.S. Air Force photo by Staff Sgt. Natasha Stannard)

A U.S. Army Soldier with the 558th Transportation Company provides security for simulated injured team members during a casualty evacuation exercise at Fort Eustis, Va., March 3, 2016. After casualties were treated they were moved for transport by helicopter, during which the detail provided security. (U.S. Air Force photo by Staff Sgt. Natasha Stannard)

U.S. Army Soldiers with the 558th Transportation Company practice casualty carry skills, as fellow company members secure the perimeter during a casualty evacuation exercise at Fort Eustis, Va., March 3, 2016. The company went through several casualty scenarios in which they practiced various carrying methods with and without a litter. (U.S. Air Force photo by Staff Sgt. Natasha Stannard)

A U.S. Army Soldier with the 558th Transportation Company prepares to call into the 159th Aviation Regiment, 5th Battalion for a 9-line medical evacuation request during an exercise at Fort Eustis, Va., March 3, 2016. The Soldiers practiced calling in a 9-line to familiarize themselves with the terms and requirements of the request. (U.S. Air Force photo by Staff Sgt. Natasha Stannard)

U.S. Army Soldiers with the 558th Transportation Company treat a simulated casualty wearing a survival suit during an exercise at Fort Eustis, Va., March 3, 2016. The Soldiers must be equipped to aid injured seafaring Service members. (U.S. Air Force photo by Staff Sgt. Natasha Stannard)

U.S. Army Soldier’s with the 558th Transportation Company practice carrying casualties to a CH-47 Chinook helicopter during an exercise at Fort Eustis, Va., March 3, 2016. During the exercise, the company assessed, treated and evacuated casualties in an austere environment. (U.S. Air Force photo by Staff Sgt. Natasha Stannard)