The downing of the Iranian frigate IRIS Dena marks the first time an American submarine has destroyed an enemy warship in decades.
An unidentified US submarine torpedoed and sunk the IRIS Dena, an Iranian Navy frigate, off the coast of Sri Lanka on Tuesday.
The Iranian warship that was sunk in the Indian Ocean likely didn’t have the technology needed to defend itself against submarines.
Since 1991, Navy subs have launched scores of cruise missiles in combat, but the torpedo attack off Sri Lanka is a return to form after 80 years.