What are the two types of defense utilized in Marine operations?

In Marine operations, the correct answer highlights the two types of defense that are crucial for effectively safeguarding positions and maintaining operational effectiveness. The terms "Perimeter" and "Linear" refer specifically to different strategic configurations in defense.

Perimeter defense encompasses a defensive strategy that involves securing the entire location or installation, forming a boundary that protects all access points. This type of defense is vital to ensure a strong defensive posture against attacks from various directions, maintaining control over the area and supporting troop movements.

Linear defense, on the other hand, focuses on creating a line of defense, which often spans a selected area of terrain. This strategy efficiently uses available resources and terrain features to establish a controlled line of engagement with the enemy, allowing for more organized and focused defense against infiltration or advance.

Both of these types of defense demonstrate the Marine Corps’ strategic emphasis on adaptability and thorough planning in securing objectives and protecting personnel, which is foundational in combat operations. The other options, while related to military tactics, do not specifically identify the recognized types of defensive formations used in Marine operations.