Player Embed Code: Download Embed Share Opening of the National Museum of the Army Defense.gov Nov. 11, 2020 | 36:10 The Army National Museum Opening Ceremony hosted by Secretary of the Army Ryan D. McCarthy, Fort Belvoir, VA, Nov. 11, 2020. The National Museum of the United States Army celebrates over 240 years of Army history and honors our nation’s Soldiers—past, present and future—the regular Army, the Army Reserve and the Army National Guard.