Maybe he wants to meet them.
The U.S. armed forces swear an oath to support and defend the Constitution of the United States against all enemies, foreign and domestic, and to obey the lawful orders of the President and their appointed officers, rather than a person or political party.
We know that under Obama (and Biden), certain officers may feel that they are loyal to the Democratic Party, rather than to the Constitution and the United States of America.
The next ten percent go based on their service records: those who embraced woke ideology, trans surgeries and mandatory COVID vaccinations hit the bricks.
That's 20% gone for a good start. And if I were Hegseth I'd have that Pentagon courtyard pavilion's roof modified with a gallows; built loudly during business hours while all the leadership offices are relocated to the top floors facing inward.
After the first few traitors test the system there should be minimum trouble in the future.