As the government teeters on the brink of a shutdown, President Donald Trump and Defense Secretary Pete Hegseth on Tuesday will address an auditorium packed with several hundred of the nation’s most seasoned military commanders summoned last-minute from around the world.

The event is slated to occur at a Marine Corps base in Quantico, Virginia, a secure site an hour south of the nation’s capital. Sources say Hegseth is expected to kick off the event at 8:15 a.m. ET with a 30-minute speech on the importance of the “warrior ethos,” a term used to describe the spirit that makes combat units effective.

Hegseth, who now goes by the title “secretary of war” as part of a broader rebranding ordered by Trump, is also expected to touch on the importance of enforcing combat standards that keep troops lethal, as well as reference new standards for grooming that include requirements for troops to remain clean-shaven.

Trump is expected to follow Hegseth with his own speech before releasing the military general and flag officers to return to their duty stations after the hourlong event.

Last week, general and flag officers at the one-star level and above were told to fly to Quantico from their duty stations with just several days’ notice and no hint as to what the meeting might be about. The Pentagon declined to comment on the meeting, and speculation quickly spread that the meeting might have to do with urgent cuts to the military force or the national defense strategy, which would set new priorities for the second Trump administration and could change how troops train and equip themselves.

In the end, though, sources said the meeting appeared — at least as of now — to be more of a “rally the troops” speech similar to what Hegseth frequently gives in public venues and in Fox News interviews. But his remarks, which will be livestreamed to the public, will also provide a prime photo opportunity with Hegseth addressing hundreds of top military generals as their boss.

On Sunday, the program was given an unexpected jolt when the White House announced Trump would join Hegseth at Quantico. The White House has not said when or how the president learned of Hegseth’s meeting or why he wanted to participate. Aides also haven’t said what Trump’s remarks will focus on.

The Defense Department, which now coined by Trump and Hegseth as the “Department of War,” has not said how much it will cost to fly in so many people last minute, although it is widely expected to cost several hundreds of thousands of dollars.

It’s also not clear exactly how many people were invited. Overall, there are 838 total general officers and admirals on active duty — 446 of them are from the higher two-star, three-star and four-star ranks — according to the Pentagon’s latest statistics from June.

The event comes as the government is careening toward a potential shutdown that could force some 2 million troops to work without pay if a spending bill doesn’t pass Congress by midnight Wednesday.

Most military personnel are on track to be paid Oct. 1, officials said Monday. But after that, troops would be at the mercy of negotiations on Capitol Hill, which remain at a stalemate.

According to a contingency plan posted by the Pentagon this weekend, all active-duty troops would be required to keep working. The plan says contracts can move forward, too, but under increased scrutiny with priority given to efforts to secure the U.S. southern border and build Trump’s U.S. missile shield known as “Golden Dome,” as well as operations in the Middle East and shipbuilding.

There had been speculation that the commanders traveling from around the world to hear Trump and Hegseth speak on Tuesday could get stuck away from their assigned work locations if the government shuts down that night. But according to government guidance, personnel must return home as soon as possible if a shutdown occurs while on work travel. Any travel costs incurred after the shutdown are reimbursable once spending resumes.