Which fundamental involves layering defensive positions to slow and degrade the attacker?

• A. Defense in Depth
• B. Flexibility
• C. Security
• D. Concentration

Answer: (A)

Layering defensive positions to slow and degrade the attacker is defense in depth. By imposing several successive lines of defense, each with its own obstacles, fields of fire, and integrated fires, the defender forces the attacker to fight through multiple hurdles. As the attacker breaches one line, the next line continues to impede progress, disrupts momentum, and creates opportunities for reserves to counterattack. This approach buys time, preserves the defender’s ability to maneuver, and allows fires from different positions to engage the attacker at multiple ranges, steadily reducing their effectiveness as they advance.

Flexibility is about adapting to changing conditions on the battlefield. Security focuses on protecting people, information, or assets. Concentration means massing forces in one area to achieve surprise or overwhelming power, which runs counter to creating multiple delaying layers.