The Typhoon-class submarine is a ballistic missile-carrying, nuclear-powered submarine (SSBN) deployed by the Soviet Navy in the 1980s. With a displacement of up to 48,000 tons, the Typhoon is the largest submarine class in the world ever built.
This submarine doesn't need any explanation. If you read the comments there, it's just breathtaking. You can easily see why this is a an art of war. This literally changed the world of war and the acts of what nations would do.
Red October no more: Russia scraps Cold War-era Typhoon submarine