I’m surprised this idiot isn’t calling himself “war secretary”.

I have therefore determined that this Department should once again be known as the Department of War and the Secretary should be known as the Secretary of War.

whitehouse.gov/…/restoring-the-united-states-depa…

Restoring the United States Department of War

By the authority vested in me as President by the Constitution and the laws of the United States of America, it is hereby ordered: Section 1.  Purpose. 

The White House
There we go.