The Torsk’s sinking of the Japanese vessel marked the last U.S. submarine kill for over eight decades — that is until March 3, 2026.

World War II proved that control of the oceans could determine the outcome of a global conflict. While battleships had long dominated naval thinking, the war quickly showed that aircraft carriers and submarines were changing the rules.

This video explores the secret submarines and torpedo technology developed by Germany and Italy during World War II. These advanced naval weapons were designed to disrupt Allied shipping routes and shift the balance of power in the Atlantic and Mediterranean theaters.

WPTV Anchor and Navy Veteran Mike Trim is listening to the local submarine veteran community after the first U.S. torpedo sinking since World War Two

To this day, there has only been one recorded instance of submarine-on-submarine warfare during WWII. The German Navy's destroyed U-864 is toxic to this day.

A single Mk-48 torpedo achieved "immediate effect" on an Iranian frigate, which was operating in the Indian Ocean, the Pentagon confirmed.

After a U.S. submarine sank Iran’s IRIS Dena with a Mk 48 torpedo, attention turned to the Navy’s primary undersea weapon that first entered operational service in 1972.