[1] The first U.S. Legation in Helsinki was established on March 19, 1920, when Chargé d'Affaires pro tem Alexander R. Magruder presented his credentials.

[1] Relations were disrupted during World War II following Finland's alliance with Nazi Germany against the Soviet Union, which led to the closing of the U.S. Legation in Helsinki on June 30, 1944.

[1] Informal relations were resumed later in the year after Finland signed an armistice with the Allies and expelled German nationals from its territory.

[1] Formal diplomatic relations were reinstated on September 1, 1945, and the American Legation in Helsinki was reestablished, with Benjamin M. Hulley serving as Chargé d'Affaires ad interim.

[1] The legation was later elevated to embassy status with Jack K. McFall assuming the role of Ambassador Extraordinary and Plenipotentiary on November 15, 1952.