U.S. Air Force Senior Airman Jack Freer, assigned to the 633d Force Support Squadron, oversees a dump truck as it drops off a pile of dirt during a bivouac exercise at Joint Base Langley-Eustis, Virginia, Oct. 15, 2024. The dirt would be built into a berm, training Airmen simultaneously on heavy equipment usage and how to properly defend a base in a contested environment. (U.S. Air Force photo by Senior Airman Ian Sullens)

U.S. Air Force Airman 1st Class Dontrelle Pennington, 633d Communications Squadron cyber security technician, left, and Staff Sgt. Gerell Johnson, 633d Contracting Squadron contract specialist dig a defensive fighting position during a bivouac exercise at Joint Base Langley-Eustis, Virginia, Oct. 15, 2024. A DFP must be at least deep enough that the tallest occupants can stand with only their head exposed. (U.S. Air Force photo by Senior Airman Ian Sullens)

U.S. Airmen form a line to pass sandbags down in order to build a defensive fighting position during a bivouac exercise at Joint Base Langley-Eustis, Virginia, Oct. 15, 2024. The bivouac simulated the setup of a base in contested territory from the ground up, training Airmen in multiple skills to ensure mission success. (U.S. Air Force photo by Senior Airman Ian Sullens)

U.S. Air Force Staff Sgt. Trent Skidmore, 633d Security Forces Squadron installation entry controller, gathers grass to cover a defensive fighting position during a bivouac exercise at Joint Base Langley-Eustis, Virginia, Oct. 15, 2024. A DFP makes use of available cover and concealment to maximize the protection of individuals manning it. (U.S. Air Force photo by Senior Airman Ian Sullens)

U.S. Airmen dig a defensive fighting position during a bivouac exercise at Joint Base Langley-Eustis, Virginia, Oct. 15, 2024. The knowledge of how to build a DFP is critical for missions downrange where more permanent defenses might not be in place. (U.S. Air Force photo by Senior Airman Ian Sullens

U.S. Air Force Airman 1st Class Logan Steed, assigned to the 633d Civil Engineering Squadron grabs a sandbag during a bivouac exercise at Joint Base Langley-Eustis, Virginia, Oct. 15, 2024. The bivouac exercise covered multiple disciplines needed to ensure multi-capable, mission ready Airmen, such as land navigation, tactical combat casualty care and base defense. (U.S. Air Force photo by Senior Airman Ian Sullens)