What form of maneuver involves applying pressure against the enemy's front?

The form of maneuver that involves applying pressure against the enemy's front is known as a frontal attack. In military operations, a frontal attack is characterized by engaging the enemy directly, typically head-on, in an effort to achieve decisive engagement. This tactic is often employed when the attacking force believes they have superior combat power or when the enemy's defenses are assessed to be vulnerable at that specific front.

A frontal attack can lead to a rapid confrontation that aims to breach enemy lines, disrupt their formations, and capitalize on any weaknesses observed. While this approach may seem straightforward, it often comes with significant risks, as the attacking force may face heavy resistance directly from the enemy's defensive positions.

The other options, while also forms of maneuver, involve different strategies that do not focus on direct frontal engagement. Single envelopment and double envelopment are maneuvers that seek to attack the enemy from the sides or rear, often aiming to encircle or isolate them. Flanking maneuvers similarly involve attacking from an angle or side to take advantage of less fortified aspects of the enemy's position, thus making the frontal attack distinct in its direct confrontational nature.