The United States is intensifying its military campaign against Iran, with Defense Secretary Pete Hegseth announcing on March 4, 2026.

The United States is intensifying its military campaign against Iran, with Defense Secretary Pete Hegseth announcing on March 4, 2026, that additional American troops and assets are being deployed to the Middle East as the conflict enters its fifth day.

In a pointed Pentagon briefing alongside Chairman of the Joint Chiefs of Staff Gen. Dan Caine, Hegseth described the ongoing Operation Epic Fury—a joint U.S.-Israeli effort—as delivering "astonishing" early results while emphasizing that the fight remains in its opening phase."We are on the fourth day and the results are astonishing," Hegseth stated. "We are winning in Iran. Their matter is over." He projected that U.S. and allied forces would achieve complete air superiority over Iranian airspace within approximately one week, vowing to strike "progressively deeper" into the country and accelerate operations rather than slow them.The defense secretary underscored that more reinforcements—including fighter jets, bombers, and ground forces—are en route to bolster the regional posture. "We are accelerating, not decelerating," he said, framing the buildup as essential to maintaining pressure on Tehran's remaining capabilities.Hegseth highlighted a significant naval development: a U.S. submarine had torpedoed and sunk an Iranian frigate (reported as the IRIS Dena) in the Indian Ocean, marking what he called the first sinking of an enemy warship by a U.S. torpedo since World War II. He declared Iran's navy largely "decimated, destroyed," and resting "at the bottom of the Persian Gulf," with multiple vessels—including Jamaran-class corvettes and other surface combatants—confirmed sunk or heavily damaged in earlier strikes.The Pentagon's assessment comes amid a rapid escalation that began late February 2026, when U.S. and Israeli forces launched coordinated attacks under Operation Epic Fury (U.S.) and Operation Roaring Lion (Israel). Targets have included Iranian command centers, ballistic missile sites, air defenses, nuclear-related facilities, naval bases, and senior leadership elements. U.S. Central Command reports over 1,700 targets struck in the first 72 hours alone, with thousands of munitions expended.Iran has mounted retaliatory missile and drone barrages against Israel, U.S. bases, and regional allies, resulting in American casualties (at least four service members confirmed killed early in the campaign) and civilian deaths across the region. Strikes have also spilled beyond Iran's borders, affecting shipping lanes and airspace from the Gulf to the Indian Ocean.President Donald Trump has described the operation as a decisive response to long-standing Iranian threats, projecting it could conclude in four to five weeks—though he has allowed it may extend longer if necessary. Hegseth repeatedly rejected comparisons to past U.S. engagements in Iraq or Afghanistan, insisting this is "not an endless war" or a regime-change occupation, but a targeted campaign to neutralize ballistic missiles, naval power, and nuclear ambitions."We fight, we win," Hegseth declared, cautioning that additional U.S. losses are expected as operations expand.

 Officials have not ruled out future ground options but stressed no large-scale "boots on the ground" in Iran are currently deployed.The conflict has triggered widespread regional fallout, including disruptions to global energy markets, evacuations of American citizens from parts of the Middle East, and diplomatic tensions. As strikes intensify and reinforcements arrive, military leaders signal no immediate de-escalation, with Hegseth warning Iranian forces: expect "death and destruction all day long" until objectives are met.