In relation to military success, why is key terrain important?

Key terrain plays a crucial role in military success because it is often a location that, when controlled, provides a significant advantage in terms of operational effectiveness and influence over the surrounding area. Control of key terrain can affect the outcome of engagements and the overall strategy employed in a military operation.

For example, key terrain can be high ground, crossroads, or other strategically important features that provide a commanding view or control over routes of movement and supply. By holding such terrain, a military force can deny the enemy access to these advantages, thus gaining an upper hand in both defense and offense. It enhances the ability to project power, conduct maneuvers, and influence the enemy's actions. Therefore, control over key terrain is critical for establishing dominance in a given operational environment and achieving military objectives.