Army Secretary Dan Driscoll has resigned from his position, the Department of Defense confirmed, ending an 18-month tenure that multiple news organizations described as increasingly strained by friction with Defense Secretary Pete Hegseth. The resignation was reported simultaneously by outlets across the political spectrum on September 1, 2026.

Driscoll, a West Point graduate and former private equity executive, was confirmed as Army Secretary in early 2025. His departure comes amid broader scrutiny of the Pentagon's civilian leadership under Secretary Hegseth, who has faced his own controversies since taking office. Reports indicated that disagreements over personnel, policy direction, and management style had created tension between the two officials in the months leading up to the resignation.

Neither Driscoll nor the Pentagon publicly detailed the specific nature of any disputes. The White House has not immediately announced a nominee for his replacement. Driscoll is expected to return to the private sector, according to reporting from Axios.

The resignation adds to a pattern of turnover at senior levels of the Defense Department during the current administration. Observers note that the Army Secretary position oversees one of the largest branches of the U.S. military, with responsibility for personnel, acquisitions, and readiness — making the vacancy significant at a time of elevated global security demands.

The Trump administration has not characterized the departure as contentious in official statements. However, reporting from The Atlantic and The Guardian described the split as reflecting deeper organizational tensions within the Pentagon's civilian leadership structure under Hegseth's direction.