Capt. Rebecca M. Lobach’s family issued a statement that described her many achievements in the service.

Defense Secretary Pete Hegseth said that “multiple operatives” had been killed in remote mountains in the country’s north.

Early in his first administration, President Trump noted the general’s “brilliance and fortitude.” And then the president got angry.

“Whatever is needed at the border will be provided,” Pete Hegseth, the new defense secretary, told reporters on Monday.

“Those who do not comply will no longer work here,” Pete Hegseth said in a handwritten notice saying diversity, equity and inclusion initiatives were not welcome at the Pentagon.

After being sworn-in by Vice President JD Vance, the Pentagon’s new leader addressed the Defense Department’s three million employees.

The removal of a portrait of Gen. Mark A. Milley, the former chairman of the Joint Chiefs of Staff, from a Pentagon hallway was among the president’s early actions.

The decision was an early salvo by the new administration against a military that President Trump has assailed for a variety of perceived offenses.

In a hearing that stretched more than four hours, Democrats pressed Pete Hegseth, President-elect Donald J. Trump’s pick for defense secretary, on numerous allegations of misconduct, his views about women in combat and his ability to lead the department. Eric Schmitt, national security correspondent for The New York Times, explains a moment that stood out in the hearing.

The incoming defense secretary will face several challenges, including the war in Ukraine and the turmoil in the Middle East.