defense transformation

Allied Command Transformation (ACT)

perimeter defense (all-around defense)

beach defense mine / beach-defense mine

active defense

active layered theatre (ballistic) missile defense (ALTBMD)

aerospace defense

aerospace defense command

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

air defense brigade

air defense command

air defense commander (ADC)

air defense control center

air defense early warning

air defense emergency

air defense fire unit

air defense forces

air defense ground environment

air defense guided missile system (AD GM sys)

air defense materiel

air defense missile

air defense missile regiment

air defense operation

air defense plan

Air defense Section (NATO IS)

air defense sector

air defense supply

air defense support (AD spt)