What is a defensive operation that focuses on the destruction or defeat of the enemy through a decisive attack by a striking force?

A defensive operation that emphasizes the destruction or defeat of the enemy through a decisive attack by a striking force is indeed the concept of a mobile defense. In a mobile defense, a unit retains the flexibility to reposition forces as needed to exploit weaknesses in the enemy's formation while maintaining a defensive posture. This allows for a counter-offensive approach where the attacking force can seize the initiative and disrupt the enemy's plans effectively.

The striking force, which is integral to a mobile defense, conducts decisive attacks against the enemy, seeking to inflict maximum damage and seize the critical advantage. This strategy not only focuses on holding positions but also on engaging the enemy dynamically to achieve tactical and operational objectives.

On the other hand, the area defense primarily concentrates on holding ground and creating a fortified position, while deception defense relies on misleading the enemy about the true positions and intentions of forces. Mobile strike, though it implies rapid response and engagement, does not necessarily encompass the comprehensive philosophy of mobile defense, which integrates counterattacks within a defensive framework. Therefore, the concept of mobile defense aligns perfectly with the requirement of engaging decisively to defeat an adversary while in a defensive posture.