In a stunning escalation of the US-Israel-Iran war, the United States has confirmed the sinking of over 30 Iranian naval vessels, marking a decisive blow to Tehran’s maritime forces and igniting unprecedented tensions in the Indian Ocean. This offensive, spearheaded by US submarines deploying torpedoes for the first time in combat since World War II, has expanded the conflict’s scope far beyond the Middle East, threatening key international shipping lanes and drawing neutral powers like India into the fray. US Defense Secretary Pete Hegseth described the operations as “necessary to dismantle Iran’s aggressive naval posture,” while Iranian leaders decried them as acts of “imperialist piracy.”
The campaign’s pivotal moment came on March 4, 2026, with the USS Delaware, a Virginia-class submarine, firing torpedoes that sank the Iranian frigate IRIS Dena in international waters near Sri Lanka. This historic strike—the first torpedo-induced warship sinking in over 80 years—resulted in the loss of at least 104 Iranian sailors, with rescue efforts hampered by rough seas. The Dena had recently concluded joint exercises with the Indian Navy, prompting sharp rebukes from New Delhi and accusations that the US disregarded regional alliances. Subsequent operations saw US submarines and carrier strike groups target additional Iranian ᴀssets, including corvettes, patrol boats, and mine-layers in the Gulf of Oman and Persian Gulf, bringing the total sunk to over 30 by March 12.
Iranian countermeasures have been fierce, with the Islamic Revolutionary Guard Corps (IRGC) Navy claiming successful missile strikes on US destroyers and supply ships deep in the Indian Ocean, approximately 600-700 km from Iranian shores. Reports indicate fires aboard the USS John S. McCain and damage to logistics vessels, forcing a temporary US retreat toward Diego Garcia. Supreme Leader Mojtaba Khamenei, in a televised address, vowed to “turn the Indian Ocean into a graveyard for American aggressors,” while proxies like the Houthis intensified disruptions in adjacent waters. Intelligence suggests Chinese reconnaissance satellites may be aiding Iranian targeting, heightening fears of great-power involvement.
As of March 12, 2026, the war has raged for 14 days since the initial US-Israeli airstrikes that killed former Supreme Leader Ayatollah Ali Khamenei. The naval theater’s expansion has spiked oil prices by 25%, with insurers rerouting tankers around Africa to avoid the Indian Ocean chokepoints. Casualties from naval engagements alone exceed 500, predominantly Iranian, adding to the overall toll of over 1,500 deaths. President Trump, addressing the nation, stated, “We’re winning big—Iran’s navy is in ruins, and we’ll keep going until the threat is gone.” Indian Prime Minister Narendra Modi convened an emergency security council, warning that further incursions could “destabilize the Indo-Pacific,” while Sri Lanka reported debris washing ashore from the Dena wreckage.
The use of torpedoes revives echoes of 20th-century submarine warfare, with experts noting the psychological impact on Iranian forces. US naval doctrine emphasizes stealth and precision, contrasting Iran’s reliance on swarms of fast-attack craft and anti-ship missiles. Diplomatic overtures remain elusive, with UN Security Council meetings ᴅᴇᴀᴅlocked amid veto threats from permanent members. As tensions erupt across the Indian Ocean, the risk of accidental clashes with commercial shipping or third-party navies grows, potentially drawing in more actors to this volatile conflict.
