The official, who spoke on condition of anonymity, confirmed a report from US broadcaster CBS that said George had been asked to take immediate retirement.

The reason for the request was not immediately known, but CBS quoted a source as saying Hegseth wanted someone who would implement his and Trump's vision for the Army.

Pentagon spokesman Sean Parnell later posted a statement on X that said George "will be retiring from his position... effective immediately," without specifying a reason.

George is the latest senior military officer to be ousted during Donald Trump's second term, and his removal as the top Army officer comes with the United States engaged in a war with Iran that the president has indicated could last for several more weeks.

During a nearly four-decade military career, George deployed to Iraq and Afghanistan multiple times and also served in positions including vice chief of staff of the Army and senior military assistant to Pentagon chief Lloyd Austin during Joe Biden's term as president.

Trump has overseen a purge of top military officers, including the chairman of the Joint Chiefs of Staff, general Charles "CQ" Brown, whom he fired without explanation in February 2025.

Other senior officers dismissed include the heads of the Navy and Coast Guard, the general who headed the National Security Agency, the vice chief of staff of the Air Force, a Navy admiral assigned to NATO, and three top military lawyers.

The chief of staff of the Air Force also announced his retirement without explanation just two years into a four-year term, while the head of US Southern Command retired a year into his tenure.

Hegseth has insisted the president is simply choosing the leaders he wants, but Democratic lawmakers have raised concerns about the potential politicization of the traditionally neutral US military.

Last year, the Pentagon chief additionally ordered at least a 20 percent cut in the number of active-duty four-star generals and admirals in the US military, as well as a 10 percent cut in the overall number of general and flag officers.