What are the three forms of defense?

The correct answer highlights three specific types of defense that infantry units utilize to maximize their operational effectiveness in various combat scenarios. Understanding these forms of defense is essential for planning and executing successful defensive operations.

The defense of a linear obstacle involves utilizing natural or man-made features (like rivers, ridges, or roads) to strengthen the defensive position. This form of defense allows units to establish strongpoints along the obstacle to control movement and limit enemy access, making it a strategic choice in many terrains.

Perimeter defense focuses on securing an area by creating an outer boundary to guard against enemy infiltration. This form ensures that all potential avenues of approach are monitored and protected, adding layers to the unit's defensive posture.

Reverse slope defense entails positioning forces on the reverse side of a hill or ridge, concealing them from direct observation and fire from the enemy while still retaining the ability to engage effectively. This method provides tactical advantages by complicating the enemy’s targeting and exposure.

These forms of defense are selected based on the terrain, the unit’s capabilities, and the enemy’s approach, demonstrating their critical role in effective military strategy.