Harry S. Truman
Standard Name: Truman, Harry S.
6 August 1945
The US dropped the first atomic bomb on Hiroshima: by early twenty-first century the best estimate of those killed on the spot stood at approaching 140,000 people, plus many thousands more with obvious, serious injury.
12 March 1947
With Russia exerting pressure on both Turkey and Greece, US President Harry S. Truman enunciated the Truman Doctrine of support for free peoples against takeover or subversion.
25 June 1950
North Korea's attack on South Korea began the Korean War.
In the USA the Internal Security Act (also known as the McCarran Act or McCarran Wood Act from the chairman of the Un-American Activities Committee ) placed various legal restrictions on Communist Party membership and members.