Captains Career Course Practice Exam 2026 - Free Practice Questions and Study Guide

The type of defensive operation that is focused on terrain and is used when available forces have less mobility than the enemy is known as area defense. This approach emphasizes holding a specific area by using the natural terrain to counteract the enemy’s movements effectively. In area defense, forces will take advantage of geographical features, fortifications, and other terrain elements to create strong defensive positions.

This strategy is particularly beneficial when faced with a more mobile enemy, as it relies on the use of fixed positions to yet create an advantage despite being outmatched in mobility. By establishing these fortified areas, defending forces can maximize their effectiveness and mitigate the enemy's ability to maneuver freely.

In contrast to area defense, retrograde operations, security operations, and mobile defense have distinct goals and tactical focuses. Retrograde operations often involve planned withdrawals and are not solely based on maintaining a specific area. Security operations are primarily aimed at preventing enemy reconnaissance and protecting friendly forces rather than establishing a fortified position. Mobile defense, while also aiming to counter a more mobile enemy, emphasizes the use of maneuver to disrupt the enemy rather than focusing on holding terrain. These differences highlight why area defense is the appropriate choice for the situation described in the question.