Claim: Washington Naval Conference was held at Memorial Continental Hall in 1921.
Evidence: The Washington Naval Conference , also called the Washington Arms Conference or the Washington Disarmament Conference , was a military conference called by U.S. President Warren G. Harding and held in Washington , D.C. , from 12 November 1921 to 6 February 1922.
Held at Memorial Continental Hall in downtown Washington DC , it resulted in three major treaties : Four-Power Treaty , Five-Power Treaty -LRB- more commonly known as the Washington Naval Treaty -RRB- , the Nine-Power Treaty , and a number of smaller agreements.