The Iranian warship that was sunk in the Indian Ocean likely didn’t have the technology needed to defend itself against submarines.

The downing of the Iranian frigate IRIS Dena marks the first time an American submarine has destroyed an enemy warship in decades.

A U.S. submarine sank the Iranian frigate IRIS Dena off the coast of Sri Lanka on March 4, 2026, killing 87 people in what amounts to the first American torpedo attack on an enemy warship since World ...

Legal experts say a U.S. submarine’s deadly attack on an Iranian warship does not appear to have violated international or American military law.

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.

A submarine attack on an Iranian destroyer proximate to Sri Lanka represents more than a discrete naval engagement; it signals a potential horizontal escalation of conflict into the wider Indian Ocean ...

India's ambition for indigenous nuclear-attack submarines faces a ten-year wait. The first vessel is projected for 2036. A ...