Permanent historical factsheet

First Manhattan Project Briefing

United States · Warfare / Nuclear. Chronological records rendered directly from the World History Database.

1Records
1945Date range
1Named people
1Places

Chronological records

1945

Harry S Truman13 April 1945

Washington · Warfare / Nuclear

Truman learns of the secret atomic-bomb development programme from Secretary of War Henry Stimson shortly after becoming president.

Names involved

Harry S Truman

Provenance

This factsheet is generated from stored World History Database records matching the country, broad category, detailed category and exact Event value shown above. Duplicate display records are collapsed; database wording is otherwise preserved. Source provenance varies by record, so formal academic citation should be checked against the relevant primary source, archive or specialist historical reference.