The museum opened on November 11, 2020.
From the website of the National Museum of the United States Army:
“The National Museum of the United States Army will serve as the capstone of the Army Museum Enterprise and provide the only comprehensive portrayal of Army history and traditions. The National Army Museum will celebrate the selfless service and sacrifice of over 30 million men and women who have worn the Army uniform since 1775. The Museum will be a technological marvel incorporating the latest advances in museum exhibits while providing advanced educational opportunities that will capture the attention of visitors old and young. As the Army’s national landmark, the Museum will honor United States Soldiers – past, present, and future – and provide an interactive educational experience explaining the Army’s role in creating and defending our nation, as well as the Army’s social initiatives and contributions for more than 240 years.”
November 11, 2020: The National Museum Of The U.S. Army Opens Near Fort Belvoir On Veterans Day
August 28, 2019: National Museum of the U.S. Army to open in June 2020