продовжувати оборону, обороняти
maintain the momentum (of the advance)
maintain
maintain the order
maintain lines
maintain а command
maintain security
maintain obstacles
maintain close contact with the situation
maintain control
maintain direction
maintain a command
maintain a connection
maintain a hold
maintain a patrol
maintain a position
maintain contact
maintain normal fires
maintain order
maintain resistance
maintain roads
maintain mastery in the air
maintain a bridgehead
maintain a secure environment
maintain readiness
Hold means maintain the last good value received
perimeter defense (all-around defense)
beach defense mine / beach-defense mine
active layered theatre (ballistic) missile defense (ALTBMD)
aerospace defense command
air defense (AD)
Air defense and Airspace Management Directorate (NATO)
air defense area