What is the primary mission of a Marine Corps rifle squad in the defense?

The primary mission of a Marine Corps rifle squad in the defense is to repel the enemy assault. This mission focuses on maintaining a stronghold in a designated area, preventing enemy forces from advancing or taking control. The rifle squad is tasked with executing defensive tactics, which can include establishing a perimeter, utilizing cover and concealment, employing fire and maneuver techniques, and effectively using available resources to counter enemy forces. The goal is to halt an attack, inflict maximum casualties on the enemy, and protect fellow Marines and critical assets.

In the context of a defense, other options such as providing logistical support, conducting reconnaissance, and establishing communications are certainly important functions in a broader operational framework, but they do not define the immediate and primary objective of a rifle squad during a defensive engagement. Their focus is primarily on combat effectiveness to defend against and repel attacks, ensuring the integrity of their position and mission objectives.