U.S. President Donald Trump is set to rename the Department of Defense as the Department of War through an executive order. Defense Secretary Pete Hegseth would be titled “Secretary of War,” and his deputy “Deputy Secretary of War.” The move reverses a 1949 decision meant to signal restraint in nuclear-era conflicts. Critics warn the change could cost billions as documents, signage, and systems are updated. Trump has also reversed other renamings, including restoring bases once stripped of Confederate-linked titles.