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1940s Timeline
(1940 - 1949)The 1940s was a transformative decade dominated by World War II (1939–1945), which involved most of the world's nations and resulted in an estimated 70–85 million fatalities. The war's end brought revelations of the Holocaust, the use of atomic weapons on Hiroshima and Nagasaki, and the founding of the United Nations. The decade also saw the beginning of the Cold War between the United States and the Soviet Union, the partition of Germany, the independence of India and Pakistan, and the establishment of Israel. Postwar recovery efforts like the Marshall Plan and the creation of NATO set the stage for the geopolitical order of the second half of the twentieth century. More Less
Science & Technology
Atanasoff-Berry computer developed at Iowa State
Jan 1, 1937 - Dec 31, 1942
The Atanasoff-Berry computer, built by John Vincent Atanasoff and Clifford Berry at Iowa State University during 1937–1942, is now considered one of the first electronic digital computing devices.
Image source: Atanasoff–Berry computer
Colossus computer built at Bletchley Park
Jan 1, 1941 - Dec 31, 1946
Construction in early 1941 of the Heath Robinson Bombe and the Colossus computer provided British codebreakers at Bletchley Park with machines used to read Enigma encrypted German messages during World War II; it remained operational until 1946, when it was destroyed under orders from Winston Churchill.
Image source: Colossus computer
Kon-Tiki raft crosses the Pacific Ocean
Apr 28, 1947 - Aug 7, 1947
In 1947, Thor Heyerdahl's raft Kon-Tiki crossed the Pacific Ocean from Peru to Tahiti, proving the practical possibility that people from South America could have settled Polynesia in pre-Columbian times.
Image source: Kon-Tiki expedition
Chuck Yeager breaks the sound barrier
Oct 14, 1947
The sound barrier was broken in October 1947, when Chuck Yeager piloted the Bell X-1 faster than the speed of sound, achieving a milestone in aviation history.
Image source: Sound barrier
Transistor invented at Bell Labs
Dec 16, 1947
The transistor was invented in December 1947 at Bell Labs by John Bardeen, Walter Brattain, and William Shockley, revolutionizing electronics and laying the foundation for modern computing.
Image source: Transistor
Albert II becomes first mammal in space
Jun 14, 1949
On June 14, 1949, Albert II, a rhesus macaque monkey, became the first mammal in space during a U.S. V-2 rocket flight, reaching an altitude of about 83 miles.
Image source: Albert II (monkey)
World War II
Nazi Germany invades Poland, Denmark, Norway and Benelux
Sep 1, 1939 - Jun 25, 1941
From 1939 to 1941, Nazi Germany invaded Poland, Denmark, Norway, the Benelux countries, and the French Third Republic, spreading war across Western Europe with devastating blitzkrieg campaigns.
Image source: Invasion of Poland
Soviet Union invades Poland and the Baltics
Sep 17, 1939 - Aug 27, 1941
From 1939 to 1941, the Soviet Union invaded Poland and Finland and occupied Latvia, Estonia, Lithuania, and the Romanian region of Bessarabia, expanding its territory under the Molotov-Ribbentrop Pact.
Image source: Soviet invasion of Poland
Battle of Britain
Jul 10, 1940 - Oct 31, 1940
Germany faces the United Kingdom in the Battle of Britain in 1940, a prolonged aerial campaign in which the Royal Air Force defended the skies over England against the German Luftwaffe, thwarting Hitler's plans for invasion.
Image source: Battle of Britain
Germany attacks the Soviet Union
Jun 22, 1941
On June 22, 1941, Germany launched Operation Barbarossa, a massive invasion of the Soviet Union that opened the Eastern Front, one of the largest and deadliest military campaigns in history.
Image source: Operation Barbarossa
Key Facts
- World War II raged from 1939 to 1945, becoming the deadliest conflict in human history with an estimated 70–85 million deaths worldwide.
- The Holocaust led to the systematic murder of approximately six million Jews by Nazi Germany, one of the darkest chapters in human history.
- The United States dropped atomic bombs on Hiroshima (August 6) and Nagasaki (August 9) in 1945, marking the only wartime use of nuclear weapons.
- The United Nations was founded on October 24, 1945, to promote international cooperation and prevent future global conflicts.
- Tensions between the United States and the Soviet Union after the war sparked the Cold War, leading to the Marshall Plan (1948), the Berlin Blockade (1948–49), and the formation of NATO in 1949.
Source
This 1940s timeline was generated with the help of AI, using information found on the internet.
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