What is the main objective of defense in military operations?

The primary objective of defense in military operations is to stop an enemy from achieving their objectives. In defensive operations, the focus is on protecting one's own forces and assets while denying the enemy the ability to fulfill their mission, whether that be capturing territory, seizing key resources, or disrupting friendly operations.

By effectively executing defensive strategies, military units aim to create a situation where the enemy cannot advance or achieve their designed goals. This may involve holding key terrain, fortifying positions, and utilizing various tactics to weaken the enemy's resolve and capability. While causes like accumulating resources, causing enemy casualties, and maintaining troop morale are important elements in broader military strategy, they serve as supporting actions to the primary goal of defense, which is to thwart the enemy's plans.