Strategic Defense refers to a military strategy focused on protecting a nation from potential threats, particularly from missile attacks. It involves the use of advanced technologies and systems to detect, intercept, and neutralize incoming missiles before they can reach their targets. This approach aims to enhance national security and deter adversaries. One notable example of Strategic Defense is the U.S. Missile Defense Agency, which develops and deploys systems like the Ground-based Midcourse Defense and Aegis Ballistic Missile Defense. These systems work together to create a layered defense, ensuring that multiple options are available to counter various types of missile threats.