Early in his first administration, President Trump noted the general’s “brilliance and fortitude.” And then the president got angry.

The removal of a portrait of Gen. Mark A. Milley, the former chairman of the Joint Chiefs of Staff, from a Pentagon hallway was among the president’s early actions.

The decision was an early salvo by the new administration against a military that President Trump has assailed for a variety of perceived offenses.

President Biden used his executive clemency power to protect people targeted by Donald J. Trump, including five members of his family as well as Liz Cheney, Anthony S. Fauci and Mark A. Milley.