What is the purpose of mutual support in defensive operations?

The purpose of mutual support in defensive operations is to ensure that defending units can provide support to one another effectively. Mutual support enables units within a defensive posture to cover each other's vulnerabilities and enhances the overall effectiveness of the defense. When units are positioned in a way that allows them to assist one another, they can increase their combat power and resilience against enemy attacks.

In practical terms, this means that when one unit is engaged, others can either provide covering fire, engage the enemy, or maneuver to reinforce positions under threat. This interconnectedness helps to create a more formidable defensive line and ensures that even if one unit encounters difficulties, it will not face the threat alone.

The other options suggest scenarios that would undermine the defense. Isolating defending units, allowing the enemy to target weak points, or facilitating an attacker’s breakthrough would all detract from the effectiveness of a defensive posture. Thus, mutual support is integral to maintaining a strong, cohesive defense against adversarial advances.