First Torpedo Sinking Since WORLD WAR II Escalates Global Conflict
In a dramatic escalation of the ongoing U.S.-led military campaign against Iran, a U.S. Navy fast-attack submarine has sunk an Iranian warship in the Indian Ocean using a single torpedo marking the first such combat sinking by an American submarine since World War II.
The targeted vessel was the IRIS Dena, a modern Moudge-class frigate considered one of Iran’s premier surface combatants. Armed with anti-ship missiles, torpedoes, heavy guns, surface-to-air systems, and capable of carrying a helicopter, the Dena had a crew of approximately 180 personnel. The attack occurred in international waters roughly 40 nautical miles (about 74 km) off the southern coast of Sri Lanka, near Galle, far from the Persian Gulf and traditional theaters of the conflict.
U.S. Defense Secretary Pete Hegseth confirmed the strike during a high-profile Pentagon press briefing on March 4, 2026.
“An American submarine sunk an Iranian warship that thought it was safe in international waters,” Hegseth stated. “Instead, it was sunk by a torpedo. Quiet death.”
He emphasized that this was the first torpedo sinking of an enemy combatant ship by a U.S. submarine since 1945, highlighting the use of a Mark 48 heavyweight torpedo for immediate, devastating effect. The Pentagon released declassified video footage showing the torpedo impact at the ship’s stern, resulting in a massive explosion, plume of water, and rapid sinking amid smoke and fire.
Sri Lankan authorities, acting as first responders in their designated search-and-rescue zone, responded swiftly to distress signals. Navy ships and aircraft recovered 32 survivors, many with injuries, who were transferred to Karapitiya National Hospital in Galle for treatment, one in critical condition, others with emergency or minor wounds. Rescue teams reported oil slicks, life rafts, and bodies floating in the water. As of the latest reports, 87 bodies have been recovered, with around 140 sailors still missing and presumed dead, pushing the casualty toll over 120.
This strike is part of the broader Operation Epic Fury, launched late February 2026 under President Donald Trump’s direction to dismantle Iran’s security apparatus, neutralize its missile and drone capabilities, destroy naval assets, and eliminate threats from its nuclear and ballistic programs. U.S. Central Command (CENTCOM) officials state that American forces have already struck or sunk over 20 Iranian vessels in recent days, with naval operations expanding well beyond the Strait of Hormuz and Persian Gulf into distant waters like the Indian Ocean.
Hegseth described the campaign as “accelerating, not decelerating,” and declared Iran “toast and they know it or soon will.” He framed the operation as “laser-focused” on degrading Iran’s offensive military infrastructure without a fixed end date, though he insisted it would not become an “endless war” like past conflicts. The action underscores U.S. naval dominance and sends a stark message: Iranian assets are no longer safe even in remote international waters.
The incident has widened the geographic scope of the conflict dramatically, raising alarms about disruptions to global shipping lanes in the Indian Ocean. Sri Lanka’s government expressed concern over the violation of regional stability, while international observers question the strategic rationale for targeting a vessel so far from Iran’s core operational areas possibly during its return from a prior port visit to India for the International Fleet Review 2026.
As airstrikes continue across Iran and retaliatory Iranian missile and drone attacks persist against U.S. and allied targets in the region, this submarine strike represents a bold demonstration of undersea warfare prowess amid a rapidly intensifying war with no immediate resolution in sight. Oil prices remain volatile, and global markets watch closely for further escalation.
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