History......
United States War Department (also called War Office):-
Formed:-
August 7, 1789;
236 years ago
Dissolved:-
September 18, 1947; 77 years ago.
Superseding agencies:-
National Military Establishment,
Department of the Army,
Department of the Air Force.
Department executive:-
"Secretary of War"
(A civillian - not POTUS)
Why the name change? I don't get it. If Elon was still in charge, he'd stop this rot - it'll cost them millions to change all the documents, signage, imagewear, badges, etc.