Army Secretary Dan Driscoll is stepping down after 18 months as Defense Secretary Pete Hegseth continues his overhaul of military leadership, leaving the Army without Senate-confirmed civilian or uniformed chiefs.
Army Secretary Dan Driscoll is leaving the Pentagon after 18 months on the job, the White House confirmed Monday, making him the latest senior military leader to depart as Defense Secretary Pete Hegseth remakes the officer corps. Driscoll met with President Trump to discuss the current state of the Army before submitting his resignation.
The White House offered no formal reason for the departure, but friction between Driscoll and Hegseth has been an open secret for months. The two clashed over the removal of top generals, the pace of personnel changes, and the Army's modernization priorities at a moment when the service is carrying its heaviest operational load since the Iraq and Afghanistan wars.
Driscoll's exit follows a string of leadership changes that have remade the Army's top ranks. In April, Hegseth dismissed the service's top uniformed officer, Gen. Randy George, without a public explanation. Gen. Christopher Donahue, the commander of Army forces in Europe and Africa, stepped down in June. When Hegseth took office, the Army counted ten four-star generals on active duty; today that number stands at five.
Driscoll was a George ally and did not hide it. Testifying before Congress in April, he recalled hearing the news of George's firing while on vacation with his family in North Carolina and driving straight to the general's home. "We walked right in, and we all gave him a hug," Driscoll said. "There is no person that has more respect for Gen. George and his 42 years of service."
He was just as candid about where authority sits. "The civilian leadership, the design of our system, is that they get to pick the leaders that they want," Driscoll told lawmakers that day. That deference did not extend to the promotion fights that followed. Hegseth has repeatedly intervened in Army promotion slates, and reports this week said at least six officers were pulled from a list of 18 recommended for advancement to two-star general. Earlier this year, Hegseth also removed officers from a one-star promotion list, drawing quiet dismay from service leaders who viewed the boards as the military's merit-based gatekeeper.
Driscoll arrived at the Pentagon as a favorite of both President Trump and Vice President JD Vance. Trump called him "a disruptor and change agent" when he nominated him, and the Senate confirmed him 66-28 in February 2025. At 38, he became the youngest Army secretary in American history, and he brought a tech investor's impatience to a department not known for speed.
He was sometimes called the president's "drone guy," pushing the Army to field unmanned systems faster and to cut red tape for contractors building counter-drone technology. He also took on an unusual diplomatic role for a service secretary, helping steer American efforts tied to the Russia-Ukraine conflict while the Army's air defenders took the lead protecting U.S. forces in the Middle East from Iranian missile and drone fire.
The White House made clear it was not a falling out with the administration's agenda. Spokeswoman Anna Kelly said Driscoll had been "highly effective in advancing President Trump's agenda to Make America Strong Again at the Department of the Army" and credited him with "outstanding leadership during historic military operations, restoring an emphasis on readiness and lethality." She added: "The United States Army is more powerful than ever thanks to his work alongside the Commander-in-Chief."
One of the sharpest divides between the two men ran straight through the drone program Driscoll championed. The Army recently pulled the plug on a Europe-based unit that had been building its own drones after studying Ukraine's use of unmanned aircraft on the battlefield. Gen. Christopher LaNeve, who rose to acting chief of staff under Hegseth, directed the unit to end its efforts and return to its traditional infantry mission.
To Driscoll and his allies, that decision cut against everything the service learned in two years of watching low-cost drones dominate modern battlefields. To Hegseth's team, it was a sign that the Army was finally consolidating its programs around proven systems instead of experiments that duplicated the broader drone enterprise. The debate is hardly academic: cheap drones and missiles have pounded U.S. positions in the Middle East, and the Army's busiest period in two decades is unfolding as its civilian leadership changes hands.
Driscoll's departure leaves the Army without a Senate-confirmed secretary and without a confirmed chief of staff. Under Secretary of the Army Mike Obadal, a retired Army colonel and special operations aviator, is next in line to serve as acting secretary until a successor is nominated and confirmed. LaNeve continues as acting chief of staff.
The resignation has sharpened questions on Capitol Hill about the pace of Hegseth's overhaul. House Armed Services Committee Chairman Mike Rogers, an Alabama Republican, told reporters Tuesday that he is "tired of all the churn." South Dakota Sen. Mike Rounds said he was disappointed to see Driscoll go and understood the departure was tied to disagreements over the firing or forced resignation of senior leaders.
Even so, the administration shows no sign of slowing down. Hegseth's project from the start has been to align the flag officer corps with a warfighting-first agenda, and the recent promotion-list decisions suggest he intends to keep personal control over who rises to the top ranks. The open question is who Trump picks to run the Army next -- and whether the Senate moves quickly enough to avoid a prolonged leadership vacuum at a service that is actively fighting.
Driscoll, for his part, leaves with options. He remains close to Vance, and speculation has already begun that he could resurface in a political capacity down the road. For now, the Army moves forward with acting leadership, a slimmer general corps, and a defense secretary who has made clear he is not finished reshaping it.
Army Secretary Dan Driscoll is stepping down after 18 months as Defense Secretary Pete Hegseth continues his overhaul of military leadership, leaving the Army without Senate-confirmed civilian or uniformed chiefs.
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