WASHINGTON — The U.S. war on Iran will continue unabated on President Donald Trump’s terms, with more troops on the way and more casualties expected, Secretary of Defense Pete Hegseth told reporters early Monday.

Speaking to the press for the first time since the United States and Israel launched a massive attack early Saturday, the secretary, whose comments came as the military announced the fourth U.S. service member killed, would not specify a timeline or exit strategy for the mission.

“We will finish this on America first conditions of President Trump’s choosing, nobody else’s, as it should be,” Hegseth said.

Hegseth did not provide details about the three U.S. service members whose deaths were announced Sunday. The secretary said that “a squirter” — apparently referring to an offensive missile or drone — was not intercepted by air defense systems.

“And in that particular case, (it) happened to hit a tactical operation center that was fortified, but these are powerful weapons,” Hegseth told reporters.

The Associated Press reported Sunday the troops were U.S. Army soldiers deployed to Kuwait.

‘Not a single overnight operation’

More U.S. troops and airpower are expected to arrive in the region Monday, according to Chair of the Joint Chiefs of Staff Gen. Dan Caine. 

“This is not a single overnight operation. The military objectives that (U.S. Central Command) and the Joint Force have been tasked with will take some time to achieve, and in some cases will be difficult and gritty work. We expect to take additional losses, and as always, we will work to minimize U.S. losses,” Caine said at the press conference alongside Hegseth.

The escalating conflict has jolted the region and rocked world energy markets as Iran continues retaliatory strikes across the Gulf nations.

Nuclear ambitions cited

The secretary said the mission, dubbed by the administration as Operation Epic Fury, is “laser focused” on eliminating Iran’s nuclear ambitions by destroying its offensive missile stockpile and production facilities, as well as its naval and security infrastructure.

“We’re hitting them surgically, overwhelmingly, and unapologetically with every passing day. Our capabilities get stronger and Iran’s get weaker. We set the terms of this war from start to finish,” Hegseth said.

The secretary sidestepped a question on how much of Iran’s infrastructure has been destroyed since Saturday. Caine said assessing what remains of Iran’s long-range strike capabilities “will take some time.”

Iran retaliation

The conflict rapidly spread Sunday and into Monday across the Middle East, as Iran launched retaliatory missiles and drones following the targeted fatal strike by Israeli defense forces and U.S. intelligence of Iran’s Supreme Leader Ayatollah Ali Khamenei.

On Monday, Iran attacked key energy infrastructure, interrupting oil and gas production in Qatar and Saudi Arabia, two of the world’s largest suppliers, according to international media outlets. 

Gulf nations, usually safe havens and luxury getaways in the volatile region, ground to a halt as strikes and debris from intercepted missiles damaged the United Arab Emirates’ Dubai International Airport, one of the world’s busiest, and nearby iconic tourist destinations, according to Reuters. 

The U.S. State Department issued directives for Americans in the region, including a shelter-in-place order Sunday for all U.S. embassy staff in Qatar as airspace remained closed.

Jets go down over Kuwait

No deaths were reported after three U.S. F-15 fighter jets crashed over Kuwait Monday in an apparent friendly fire incident, according to U.S. Central Command. Video of an apparent U.S. fighter jet falling from the sky circulated on social media Monday.

The fighting spread to Lebanon after Iranian-backed Hezbollah fighters fired rockets into Israel. Israel returned fire, including in Lebanon’s capital, Beirut. Several media outlets reported casualties, citing Lebanon’s health officials.

Nine people were killed Sunday in central Israel after a missile hit a synagogue bomb shelter, The Associated Press reported.

Buildup of troops over past month

The administration began amassing thousands of troops, aircraft and naval ships over the past 30 days in the region, including relocating its largest aircraft carrier, the USS Gerald Ford, from its position in the southern hemisphere where U.S. troops apprehended Venezuela’s leader on Jan. 3.

The “rapid buildup,” Caine said, included service members from Wisconsin’s Army National Guard, which was operating in Kuwait and Iraq, and Air National Guard units from various states, including Vermont and Virginia.

Caine would not answer questions about the total number of U.S. troops involved.

Trump gave the final order for the attack on Friday, just before 4 p.m. Eastern, and joint strikes with Israel’s forces commenced overnight Saturday, at 9:45 a.m. Tehran time.

“The president directed, and I quote, ‘Operation Epic Fury is approved. No aborts, good luck,’” according to Caine.

Operations centers in Tampa, Florida and at the Pentagon directed strikes on more than 1,000 targets in the first 24 hours, Caine said.

This story was first published on Mar. 2, 2026 by States Newsroom.