What is the key characteristic of Vertical Envelopment in military maneuvers?

Vertical Envelopment is a military maneuver characterized by troops conducting an attack on the enemy's rear flanks, typically following an airborne insertion. This tactic capitalizes on the element of surprise and aims to disrupt the enemy's command and control capabilities, logistic lines, and overall operational effectiveness by hitting them where they are least prepared.

The airborne insertion allows for rapid deployment of forces directly into the areas where they can achieve significant operational impact, often bypassing front-line defenses. This method can create confusion and disarray within the enemy's ranks and can lead to an advantageous tactical position for the attacking forces.

In contrast, options that suggest a front-line attack, focus solely on defensive tactics, or remaining stationary do not capture the essence of Vertical Envelopment, which fundamentally relies on mobility, surprise, and attacking vulnerable points in the enemy's formation.