The Pentagon, headquarters of the United States Department of Defense, has experienced a wave of dismissals under the Trump administration. The Chairman of the Joint Chiefs of Staff is the most senior uniformed officer in the United States military, advising the President on military matters. Defense Secretary Pete Hegseth has defended these actions, claiming they are not unusual and citing historical precedents. - President Trump initiated a major shakeup of the Pentagon's leadership. - General CQ Brown, the chairman of the Joint Chiefs of Staff, was among those dismissed. - Defense Secretary Pete Hegseth defended President Trump's dismissal of Pentagon officials. - The dismissals have sparked accusations of injecting politics into the military. - The role of Chairman of the Joint Chiefs of Staff involves advising key government figures on military matters.