2019 marks the 70th anniversary of the North Atlantic Treaty Organization (NATO).

Every American president since Harry Truman, who championed NATO’s creation in 1949, has reaffirmed the United States’ commitment to the principle of collective defense, which makes up the core of this now 29-nation alliance.

Slideshow of pictures of presidents and quotes about NATO (State Dept./S. Gemeny Wilkinson)
(State Dept./S. Gemeny Wilkinson)

Research by Leigh Hartman

This article was originally published March 30, 2017.