Army Secretary Dan Driscoll submitted his resignation to President Donald Trump on August 31, 2026, after serving 18 months in the role. The departure followed months of reported tensions with Defense Secretary Pete Hegseth concerning the removal of senior military leaders. The White House confirmed the resignation, noting that Driscoll had assisted in negotiations between Russia and Ukraine and worked to restore military readiness.
The resignation occurred during a period of leadership turnover at the Pentagon, where at least 20 general officers, admirals, and civilian leaders have departed since Hegseth took office. Hegseth, a former Army National Guard officer, has removed or blocked the promotions of dozens of senior officials as part of a stated effort to overhaul the department. Driscoll, a former Army officer and venture capitalist who previously advised Vice President JD Vance, had focused his tenure on modernizing Army equipment and studying drone warfare.
Driscoll’s exit leaves the Army without a Senate-confirmed civilian or uniformed leader. General Christopher LaNeve currently serves as acting Army chief of staff after Hegseth asked the previous chief, General Randy George, to retire in April. Hegseth is reportedly considering his senior adviser and Pentagon spokesperson Sean Parnell to succeed Driscoll. However, Deputy Undersecretary of the Army Dave Fitzgerald is also expected to resign later this week, according to reports by the Wall Street Journal.
The vacancy in the Army’s top civilian post affects the administrative oversight of active-duty soldiers and their families. With no Senate-confirmed Secretary or Chief of Staff, the service is currently led by acting officials, a status that Retired Navy Rear Adm. Mark Montgomery stated could weaken the force's readiness for major combat operations. The leadership vacuum occurs as the Army transitions its drone warfare strategy; a new drone battalion established by the previous chief of staff to incorporate lessons from Ukraine was recently ordered to be phased out by current leadership.
Hegseth has publicly stated his intent to remove leaders involved in diversity, equity, and inclusion (DEI) initiatives, which he characterized as "woke." A source familiar with promotion lists reported to CBS News that Black and female officers have been disproportionately removed from these lists, and there are currently no active four-star women generals or admirals in the U.S. military.
Hegseth’s preferred candidate for Army chief of staff, General LaNeve, has faced opposition from senators on both sides of the aisle. If Sean Parnell is nominated to succeed Driscoll, he may face scrutiny regarding a 2021 court fight over child custody that led him to withdraw from a previous Senate run.
Military lawyers, known as Judge Advocates General (JAG), also face a "hard reset" of their functions. Hegseth has ordered them to narrow their focus to warfighting and military justice while handing environmental and civilian-related concerns to civilian lawyers.