March 11, 1941 – September 25, 1943: Administrator of the Office of Lend-Lease Administration
October 4, 1943 – November 30, 1944: United States Under Secretary of State
December 1, 1944 – June 27, 1945: 48th United States Secretary of State
January 17, 1946 – June 3, 1946: 1st United States Ambassador to the United Nations
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