How does US military structure work? Explaining the system as Pete Hegseth slammed for firing officers

The US military is structured under the Department of Defense and comprises six armed forces—Army, Navy, Air Force, Marine ...
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How the War Department became the Department of Defense – and back again

This article appeared in History of War magazine issue 153. In September 2025 President Donald Trump signed an executive order renaming the Department of Defense to the 'Department of War', reverting ...