Pentagon chief Hegseth promises ‘most intense day’ of US strikes as Iran war escalates

United States Secretary of Defence Pete Hegseth has said American forces are preparing for what he described as the most intense round of strikes against Iran since the conflict began.

Hegseth made the remark during a briefing with reporters on Tuesday. He stated that the United States believes it is gaining the upper hand in the war. However, he declined to give a timeline for when the fighting might end. He said President Donald Trump will determine the pace of the campaign.

According to the Pentagon chief, Washington’s military operations are focused on weakening Iran’s missile capacity, destroying its naval forces and ensuring that Tehran can never obtain nuclear weapons.

“We will not relent until the enemy is totally and decisively defeated,” Hegseth said.

“We do so on our timeline and at our choosing. For example, today will be yet again, our most intense day of strikes inside Iran – the most fighters, the most bombers, the most strikes.”

Despite the claims from Washington, Iranian leaders have projected defiance. They have promised that the country will continue to resist the attacks.

“Those mightier than you have not been able to eliminate our nation. Those who have tried have become eradicated themselves,” Iranian official Ali Larijani wrote in a social media post on Tuesday.

Iran has repeatedly denied that it is pursuing nuclear weapons. Authorities in Tehran insist the country’s nuclear programme is peaceful. The denial comes despite earlier claims by President Trump that US strikes in June 2025 had “obliterated” Iran’s nuclear programme.

The conflict has already led to heavy casualties. US and Israeli strikes have killed Iran’s Supreme Leader Ali Khamenei along with more than 1,250 other people. Iran has responded with missile and drone attacks against Israel and other targets across the region.

Iranian forces have also targeted oil facilities in several Gulf countries. The military campaign has disrupted shipping through the Strait of Hormuz, which is one of the world’s most important energy routes. The disruption has pushed global fuel prices higher.

President Trump warned Iran on Monday that it would face “death, fire, and fury” if it continued to block oil shipments through the strategic waterway.

Larijani responded with a warning of his own. He said the strait “will either be a Strait of peace and prosperity for all or will be a Strait of defeat and suffering for warmongers”.

Top US General Dan Caine said American forces are still tracking and striking vessels suspected of laying naval mines in the Gulf. He noted that Washington has not yet decided whether the US Navy will escort oil tankers through the strait.

“If tasked to escort, we’ll look at the range of options to set the military conditions to be able to do that,” Caine said.

The war has also revealed differences in military priorities between the United States and Israel. Last week, Israeli forces struck oil depots in Tehran. The attack triggered large fires and thick smoke across the Iranian capital. The move attracted criticism from some supporters of the war.

Hegseth acknowledged that Israel has its own objectives in the conflict. He indicated that attacks on Iran’s energy infrastructure were not a primary US goal.

“Israel has been a really strong partner in this effort. Where they have different objectives, they pursued them. Ultimately, we’ve stayed focused on ours,” he said.

Questions remain about the long-term aim of the war. President Trump has offered different explanations in recent weeks. His statements have ranged from promoting “freedom” for Iranians to suggesting that a new Iranian leader from within the country’s political system could emerge and cooperate with US and Israeli demands.

When asked how long the conflict might last, Hegseth said the final decision rests with the president.

“The president has set a very specific mission to accomplish, and our job is to unrelentingly deliver that. Now, he gets to control the throttle. He’s the one deciding.”