Defense Clandestine Service (DCS)

direct commercial sales (DCS)

clandestine

clandestine operation; covert operation

clandestine border crossing

clandestine operation

clandestine organization

experience with clandestine work

keeper of a clandestine address

give clandestine assistance

clandestine agencies

clandestine agent

clandestine assembly area

clandestine force

clandestine operations

clandestine passive resistance

clandestine patrol base

clandestine reconnaissance

clandestine warfare

perimeter defense (all-around defense)

beach defense mine / beach-defense mine

Defense Security Service (DSS)

US Army Trial Defense Service

Defense Audit Service

secret defense service

branch (military/service branch, armed service)

separate from active service / the service

Y service (Y-service) / Y-station

regional meteorological service/ regional weather service (RWS)

emergency service / emergency operations service

active layered theatre (ballistic) missile defense (ALTBMD)

aerospace defense command

air defense (AD)