The United Nations Charter earned the support of the U.S. on this date in 1945 when President Harry S. Truman ratified it. World leaders hoped the document would help usher in an era of peace after the brutality of World War II. 

Based upon content from the book Missouri 365: This Day in Missouri History by John W. Brown, broadcaster and Missouri historian. Get your copy at Reedy Press.

Photo credit: Harry S. Truman, the President of the United States / Walters, Seattle. , ca. 1945. Photograph.