What is the distinguishing feature of the main defense force in the defense strategy?

The distinguishing feature of the main defense force in the defense strategy is conducting the primary defensive mission. This aspect is crucial because the main defense force is primarily tasked with establishing and maintaining a solid defensive posture to repel enemy attacks. It is designed to hold territory, protect critical assets, and ensure the integrity of defensive positions while engaging in combat to stop or slow an adversary’s advance.

In the context of defense strategy, the main force's role is pivotal; while executing offensive maneuvers or managing tactical reserves is important, these activities are typically supplementary to the primary mission of defense. Maintaining supply lines is essential for supporting operations but does not define the main force's primary function, which is to defend against enemy actions effectively. Therefore, the clear emphasis on conducting the primary defensive mission makes it the most distinguishing feature of the main defense force.