Washington Naval Conference resulted in the Five-Power Treaty of 1921.
Washington Naval Conference . Held at Memorial Continental Hall in downtown Washington DC , it resulted in three major treaties : Four-Power Treaty , Five-Power Treaty ( more commonly known as the Washington Naval Treaty ) , the Nine-Power Treaty , and a number of smaller agreements . Washington Naval Treaty . It was negotiated at the Washington Naval Conference , held in Washington , D.C. , from November 1921 to February 1922 , and it was signed by the governments of the United Kingdom , the United States , Japan , France , and Italy . The naval treaty was concluded on February 6 , 1922 .