Hegseth is shaking up the Pentagon as the US wages war - but at what cost?

What Happened

US Secretary of the Army Dan Driscoll resigned last Monday after clashing with Defense Secretary Pete Hegseth over the pace and nature of military reform. Driscoll had pushed for urgent modernization by integrating drones into ordinary Army formations, citing lessons from the Ukraine war about cheap drones and anti-missile systems challenging US military bureaucracy and procurement. Hegseth had initiated parts of the modernization plan but reportedly came into conflict with Driscoll and others advocating rapid expansion, including by firing generals responsible for that modernization. Driscoll's departure followed a broader shake-up in which Hegseth removed or sidelined the top uniformed officers of the Army, Navy, and Air Force, as well as at least two dozen generals, admirals, and civilian defense leaders, often with little explanation. Hegseth has publicly framed his actions as cultural change, vowing to end 'woke' initiatives, scrap 'stupid' rules of engagement, ban beards, and purge 'fat generals'. Senator Thom Tillis called for Hegseth's firing, saying he had 'never witnessed more inept management of the brave men and women who serve our country'. Former Trump National Security Adviser H.R. McMaster said Driscoll had been pushing a modernization agenda 'to catch the army up'. Vice President JD Vance defended Hegseth, saying he was in 'strident agreement' about the need for a culture shift after '40 years of lost wars'. The White House said President Trump had 'full confidence' in Hegseth and cited operations 'Epic Fury', 'Absolute Resolve', and 'Midnight Hammer' as evidence of success. Analysts and former officials described the departures as a 'hollowing out' of military leadership and a 'gutting of the centre', with concerns about readiness and command continuity alongside simultaneous US military operations in the Middle East and elsewhere.

Key Actors

Why It Matters

The leadership turmoil at the Pentagon directly affects US military readiness and the execution of simultaneous global operations, including strikes on Houthi targets in Yemen, deterrence against Iran in the Strait of Hormuz, support for Ukraine, NATO commitments in Europe, and deterrence of China in the Indo-Pacific. The removal of senior modernization advocates and top uniformed officers may disrupt momentum on adapting the US Army to drone warfare and 21st-century threats, as highlighted by the Ukraine conflict. The article raises concerns that the scale of departures is creating uncertainty and risk across the US military's global network of alliances at a time when the US is actively engaged in multiple theatres.

Watch For

Monitor further departures of senior civilian and uniformed Pentagon leaders, especially those overseeing Army modernization and drone integration. Watch for congressional responses beyond Senator Tillis's call, including any Senate Armed Services Committee hearings or confirmation fights over replacements. Track the operational impact on US Central Command as two carrier strike groups and B-2 bombers remain positioned in the Middle East amid Houthi strikes and Iran tensions. Also watch for signs of strain on US commitments to Ukraine, NATO, and Indo-Pacific deterrence as leadership churn continues, and for any formal White House or Defense Department announcements on new appointments or policy directives.