air defense region (ADR)

Annual defenseReview (ADR)

arid region

army readiness region

flight information region (FIR)

geostrategic region

strategic region

depot distribution region

ensure peace and stability in the region

hydrodynamic lubrication region

irrotational region

stagnation region

dead region

vorticity region

search and rescue region

simply coherent region

simply connected region

transition region

densely populated (densely-populated) area (region) / territory / country

confusion region

region of interest (ROI)

Air Force Air Defense Command

perimeter defense (all-around defense)

beach defense mine / beach-defense mine

aerial refueling / air refueling / in-flight refueling (IFR) / air-to-air refueling (AAR)

air combat capable helicopter / air-to-air capable helicopter

air support field pack, field pack air support, airborne / para (air support) / Pathfinder Bergen

air defense (AD)

Air defense and Airspace Management Directorate (NATO)

air defense area

air defense artillery (ADA)

air defense artillery battalion

air defense artillery system