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D-Day
Allied invasion of Normandy by storming the beaches during WWII. It led to the liberation of Paris. -
Harry Truman
33rd President who put an end to WWII in the Pacific with the atomic bombs. Also known for the Truman Doctrine which said that US should help those threatened by Communism. -
Surrender of Germany
Germany unconditionally surrendered in Reims, France to the Allies. This ended WWII and the Third Reich. -
Hiroshima and Nagasaki
The nuclear bombing of these two cities in Japan during WWII was the first deployed atomic bomb. It stopped the war in the Pacific. -
NATO
North American Treaty Organization between 30 countries from North America and Europe. Its purpose is to protect through political and military means. An attack against one of them is considered an attack against all. -
Hydrogen Bomb
Harry S. Truman announced support for the development of the hydrogen bomb. It is a hundred times more powerful than the atomic bombs. -
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The Korean War
Between North and South Korea. The US air, ground, and naval forces were ordered by Truman and joined in support of the South -
DNA discovered
James Watson and Francis Crick discovered the double-helix structure of DNA, which became important to molecular biology. They were awarded the Nobel Prize in Physiology or Medicine in 1962.