Britain's nuclear submarine fleet, long marketed as a round-the-clock shield, is facing intense pressure from aging boats, ...

As it tried to demonstrate its continuing ability to fight, Ukraine said it had used drones to inflict serious damage on a ...

Ukraine’s domestic security service, the SBU, said Monday that it struck a Russian submarine in the Black Sea port of Novorossiysk, causing critical damage to the vessel and effectively disabling it.

Ukraine's internal security agency said the attack damaged and disabled a Russian Kilo-class submarine in the port city of ...