British Royal Navy Submarine HMS Triumph, N18, at sea, date not given. / Getty Images The last attack by the vessel is believed to have been against an Axis cement freighter.

The HMS Triumph made its maiden voyage in 1938, just a year before World War II commenced, and carried out 20 missions before vanishing. 6.

HMS Queen Elizabeth (R08) and escorts of the Royal Navy Carrier Strike Group 21 (CSG 21) returned to their home… USNI News is the independent, non-profit news service of the Naval Institute. Our ...