The Pentagon joined the scramble by federal agencies trying to conform to President Trump’s war on diversity programs.

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.

The new defense secretary’s goals run counter to the military’s apolitical tradition and efforts to build a force that mirrors America.

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

Senators Lisa Murkowski, Susan Collins and Mitch McConnell voted against confirming Donald Trump’s pick for defense secretary. To Capitol insiders, their decisions weren’t surprising.

In 2017, Betsy DeVos barely survived her confirmation vote to become President Trump’s secretary of education.

The Department of Defense said this week that it would provide planes for deportation flights.

With two G.O.P. senators opposed, Pete Hegseth, President Trump’s pick for defense secretary, can afford to lose only one more. If he is confirmed, it is likely to be by the smallest margin for that post in modern times.

For the last 50 years, almost every nominee to lead the Pentagon has been a consensus pick who drew lopsided margins of support in the Senate. Pete Hegseth’s nomination has been a notable exception.

The settlement’s existence after a 2017 accusation had been documented before the defense secretary nominee’s confirmation hearing this month, but the amount had not been known publicly.

The new administration does not yet have a confirmed defense secretary, attorney general or solicitor general in place.

From national security to home insurance, the president has quickly changed America’s climate adaptation policies in important ways.

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.

All but two Republicans voted to advance Pete Hegseth’s nomination as secretary of defense to a final vote, as Democrats raced to bolster fresh allegations about his personal conduct.

A woman once married to the brother of Pete Hegseth, the defense secretary nominee, submitted a sworn statement to the Senate in a late-hour complication to his confirmation. His lawyer denied her account.

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

The Iowa Republican’s decision dramatically increases the likelihood that Mr. Hegseth will have enough votes to be confirmed as President-elect Donald J. Trump’s defense secretary.