Below is a list of external resources for further exploration. Included are important museums, libraries, and historical and research centers relevant to the United States Military, its history, and its representation.
Congressional Research Service
U.S. Army Center of Military History
Naval History and Heritage Command
National Museum of the Marine Corps
National Museum of the U.S. Navy
National Museum of the U.S. Air Force
National Museum of the U.S. Army
U.S. Air Force Historical Research Agency
U.S. Marine Corps History Division
Combined Arms Research Library (CARL) at Fort Leavenworth, Kansas
U.S. Army Heritage & Education Center
Air University (U.S. Air Force War College Library)