U.S. Army Chief of Staff Randy George has been asked to step down by Defence Secretary Pete Hegseth and ‌to take immediate retirement, two U.S. defence officials and a source familiar with the matter told Reuters on Thursday.

Hegseth, a former Fox News host, has moved quickly to reshape the department, firing top generals and admirals as he seeks to implement Trump's national security agenda.

The sources did not indicate why Hegseth asked George to ​leave his post. The move was first reported by CBS News.

George, an infantry officer who served in Iraq and Afghanistan, was ​confirmed to the top Army post in ​2023. Terms in that role usually run for four years.

Prior to holding the ‌top ⁠job, George was the vice chief of the Army and, before that, the senior military adviser to then-Defense Secretary Lloyd Austin.

George's removal adds to ​recent upheaval at ​all levels ⁠of leadership at the Pentagon, including the firing last year of the previous chairman ​of the Joint Chiefs of Staff, Air ​Force ⁠General C.Q. Brown, as well as the chief of naval operations and Air Force vice-chief of staff.

The office for George ⁠did ​not immediately respond to a ​request for comment.