A Submarine-Launched Ballistic Missile (SLBM) is a type of missile that is launched from submarines. These missiles are designed to deliver nuclear or conventional warheads over long distances. SLBMs are typically housed in vertical launch tubes within the submarine, allowing for stealthy deployment and surprise attacks. SLBMs play a crucial role in a country's nuclear deterrent strategy, providing a second-strike capability. This means that even if a nation is attacked, its submarines can remain hidden underwater and retaliate, ensuring a balance of power. Notable examples of SLBMs include the Trident II and RSM-56 Bulava.