See https://www.whitehouse.gov/presidential-actions/2025/09/restoring-the-united-states-department-of-war/ https://www.whitehouse.gov/presidential-actions/2025/

See https://www.whitehouse.gov/presidential-actions/2025/09/restoring-the-united-states-department-of-war/ https://www.whitehouse.gov/presidential-actions/2025/09/rest..., section 2(e): "Statutory references to the Department of Defense, Secretary of Defense, and subordinate officers and components shall remain controlling until changed subsequently by the law." That is, until a law is passed by Congress, DoD is the primary, controlling title (DoW is an "additional secondary title" according to the EO).