Defense Secretary Pete Hegseth has taken the extraordinary step of revoking the security detail and clearance of retired General Mark Milley, a move that has drawn significant attention and criticism. Hegseth has ordered the Pentagon's inspector general to investigate Milley's conduct, with the possibility of reducing his rank from four stars [1]. This decision is part of a broader pattern by the Trump administration to revoke protections for former officials who have clashed with the president, including former Secretary of State Mike Pompeo and National Security Adviser John Bolton [2].

The revocation of Milley's security detail has raised concerns about national security, particularly given the ongoing threats he faces from Iran following the 2020 U.S. drone strike that killed Iranian General Qasem Soleimani [1]. Critics, including Senator Jack Reed, have condemned the move as reckless and politically motivated, arguing that it endangers Milley and his family [1]. The decision also highlights the ongoing tensions between Trump and Milley, who has been a vocal critic of the former president's actions and policies [3].

The investigation into Milley's conduct is seen by some experts as an unprecedented move that could have far-reaching implications for civil-military relations. Peter Feaver, a political science professor, remarked on the unusual nature of punishing a former appointee in such a public manner [1]. The investigation will look into Milley's alleged undermining of the chain of command, a charge that has been met with skepticism by many in the defense community [3]. With President Biden having issued pre-emptive pardons to Milley and others, it remains to be seen how this will affect the investigation and any potential actions by the Trump administration [2].