64th Anniversary of the signing of the North Atlantic Treaty
By
Office of the Historian, U.S. Department of State
From Office of the Historian, U.S. Department of State: In this agreement, the United States, Canada, Belgium, Denmark, France, Iceland, Italy, Luxemburg, the Netherlands, Norway, Portugal, and the United Kingdom agreed to consider attack against one an attack against all, along with consultations about threats and defense matters.