I have one question.
In the original version of the War Department, there was also a Navy Department in the Cabinet. This is because appropriations for the Army under the Constitution cannot exceed two years, while building and deploying a Navy is a long-term project.
Is the Navy now included in the War Department?
What was the War Department became the Department of the Army when the Department of Defense was created in 1947. It, the Department of the Navy, and the new Department of the Air Force were all part of the Department of Defense. It seems to me that the only change is to the name. The Department of Defense is now the Department of War and the individual service departments all still all part of the overall whole organization. Nothing has changed in that aspect has changed other than the name.