type: timeline_event
On March 4, 2026, Defense Secretary Pete Hegseth held a Pentagon briefing in which he declared that the U.S. had effectively destroyed Iran's navy and killed all of its senior naval leadership. CENTCOM reported having destroyed over 30 Iranian ships — comprising significant portions of both the Islamic Republic of Iran Navy (IRIN) and the Islamic Revolutionary Guard Corps Navy (IRGCN) — in six days of operations. Hegseth stated that Iran "cannot outlast" the U.S. in the conflict and that the goals of Operation Epic Fury remained "laser-focused."
Specific vessels destroyed included the IRIN's Jamaran-class frigate Dena, sunk in the Indian Ocean by a U.S. Navy submarine, and the IRGCN flagship Soleimani, the first of its class, sunk on March 3. The Pentagon also reported that Iranian ballistic missile attacks on U.S. and Israeli positions had been reduced by approximately 90 percent since the start of the operation, attributing this to the systematic destruction of missile batteries, launch platforms, and production facilities.
Hegseth's briefing also addressed Operation Epic Fury's four stated objectives: preventing Iran from acquiring nuclear weapons, destroying its ballistic missile arsenal and production capacity, eliminating its naval force, and degrading its proxy networks. He insisted the operation was proceeding on schedule and that U.S. forces would achieve "complete, uncontested control" of Iranian airspace "under a week."
The tone and substance of the Pentagon's public messaging — claiming total destruction of an adversary's military branch and promising complete airspace dominance — represented an unusually triumphalist posture for a conflict still in its first week. Independent military analysts noted that while Iranian naval capabilities had been severely degraded, Iran's IRGC continued to operate independently of central command and the conflict showed no signs of an imminent end. The gap between Pentagon claims and conditions on the ground echoed patterns of optimistic official messaging that characterized early stages of the Afghanistan and Iraq conflicts.