President Trump has fired Charles Q. Brown Jr. as chair of the Joint Chiefs of Staff, the nation’s highest-ranking military officer, as part of what is being described as an unprecedented purge of the U.S. military leadership. Brown was the second Black general to serve in the position. Trump is replacing him with Dan Caine, a lower-ranking retired Air Force lieutenant general who will likely need a waiver to serve the post because he doesn’t meet the job requirements. In addition, Defense Secretary Pete Hegseth fired the chief of the Navy, Admiral Lisa Franchetti, the first woman to hold the post. Hegseth also fired the top lawyers for the Army, Navy and Air Force.