"First Strike" refers to a military strategy that involves a preemptive attack aimed at neutralizing an opponent's ability to respond effectively. This tactic is often associated with nuclear warfare, where a nation seeks to eliminate the threat of retaliation by targeting an adversary's nuclear arsenal before it can be launched. The concept is closely linked to the doctrine of Mutually Assured Destruction (MAD), which posits that the threat of total annihilation deters nations from initiating conflict. However, the use of a first strike raises ethical and strategic concerns, as it can lead to escalation and unintended consequences in international relations.