Soviet submarines were a crucial part of the Soviet Navy during the Cold War, designed for various missions including surveillance, deterrence, and combat. They were known for their advanced technology, including nuclear propulsion, which allowed them to operate underwater for extended periods without surfacing. These submarines came in different classes, such as the Yankee-class and Typhoon-class, each serving specific strategic purposes. The Typhoon-class was one of the largest submarines ever built, capable of carrying intercontinental ballistic missiles. Overall, Soviet submarines played a significant role in naval warfare and global military strategy.