What are the two types of measures used to defeat, contain, or neutralize threats in the rear area?

• A. Direct and indirect
• B. Active and Passive
• C. Offensive and Defensive
• D. Primary and Secondary

Answer: (B)

Two types of measures used to defeat, contain, or neutralize threats in the rear area are active and passive measures.

Active measures are actions that directly confront and disrupt threats—things like aggressive patrols, counter-reconnaissance, and security operations aimed at locating, destroying, or bottling up threats before they can cause harm.

Passive measures, on the other hand, are protective and preventive. They reduce vulnerability without directly engaging the enemy, through camouflage and concealment, dispersion of forces and assets, hardening of facilities, access control, secure movement planning, deception, and robust warning and security procedures.

Together, active measures push back against threats, while passive measures make it harder for threats to succeed or cause damage if they penetrate. Other option groupings don’t specifically capture this dual approach to rear-area security—direct/indirect pertains to fire delivery, offensive/defensive is a broad posture, and primary/secondary isn’t used to describe rear-area measures.