The Delta-class submarines, central to the Soviet Union's Cold War naval strategy, have evolved through multiple variants since their 1970s debut. These nuclear-powered ballistic missile submarines, including the Delta I, II, III, and IV variants, were developed to counter NATO forces with strategic nuclear capabilities. The Delta II class, developed after the Project 667A
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The Democratic People’s Republic of Korea (DPRK or North Korea) is in the midst of developing programs for both submarine-launched ballistic missiles (SLBMs) and ballistic missile submarines (SSBs), potentially expanding the credibility, flexibility, and survivability of its current land-based nuclear force. Expansion of the DPRK’s nuclear force from a land-based monad to a land-based and sea-based dyad could increase the danger to the U.S.
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