The treaty which ushered in NATO, was signed by the member nations at

Solution (By Examveda Team)

The treaty which ushered in NATO, was signed by the member nations at Washington. On 4 April 1949, the foreign ministers from 12 countries signed the North Atlantic Treaty (also known as the Washington Treaty) at the Departmental Auditorium in Washington, D.C.: Belgium, Canada, Denmark, France, Iceland, Italy, Luxembourg, the Netherlands, Norway, Portugal, the United Kingdom and the United States.