Which term best fits the description of layered defense against ballistic missiles?

The concept of layered defense against ballistic missiles is best captured by the term "Defense in Depth." This approach involves utilizing multiple defensive measures across various layers, which may include early detection, tracking, interception, and kinetic or non-kinetic measures to engage incoming threats at different points in their trajectory.

The idea is to create a safety net that can intercept missiles at various stages, whether during their boost phase, midcourse phase, or terminal phase, thereby increasing the chances of successfully neutralizing a threat before it can cause damage. By employing a layered strategy, defense systems are able to mitigate the risk of failure at any single point and enhance overall effectiveness against potential missile strikes.

While other terms like Missile Interception and Ballistic Shielding may relate to specific aspects of missile defense, they do not encompass the comprehensive approach of integrating various defensive measures throughout the missile's flight path. An Integrated Defense Strategy also suggests a holistic approach but may not specifically highlight the multiple layers necessary for effective ballistic missile defense.