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atomic bombings of Hiroshima and Nagasaki
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Atomic bombing of Hiroshima Infographic titled The First Atomic Bombs, showing key facts about the first atomic bomb test in New Mexico and the bombings of Hiroshima and Nagasaki in Japan during World War II. Includes diagrams of bomb mechanisms, a map of Japan with target cities, and illustrations of the Little Boy and Fat Man bombs, along with details on deployment, explosive yield, and estimated casualties. A diagram illustrating nuclear fission: a neutron strikes a uranium-235 nucleus, splitting it into barium and krypton nuclei, releasing energy and additional neutrons. Otto Hahn Lise Meitner and Otto Hahn Neils Bohr
Fission of a uranium nucleus by a neutron
Split image showing Dr. J. Robert Oppenheimer at a chalkboard on the left and actor Cillian Murphy portraying Oppenheimer with a cigarette and hat on the right.
Manhattan Project interactive timeline James Bryant Conant, wearing glasses and a suit, sits at a desk with his hands resting on the surface, looking slightly to the side.
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Germany invades Poland, September 1, 1939, using 45 German divisions and aerial attack. By September 20, only Warsaw held out, but final surrender came on September 29.
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atomic bombings of Hiroshima and Nagasaki summary
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U.S. marines raising the American flag over Mount Suribachi, Iwo Jima, in February 1945
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Louis IX of France (St. Louis), stained glass window of Louis IX during the Crusades. (Unknown location.)
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atomic bombings of Hiroshima and Nagasaki: References & Edit History

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Article History

Type Description Contributor Date
Add new Web site: LOUIS Pressbooks - American History from Reconstruction to the Present - The Pacific Theater and the Atomic Bomb. Sep 16, 2026
Anniversary information added. Aug 07, 2026
Add new Web site: BBC - Witness History - The atomic bombs dropped on Japan. Jan 17, 2026
Add new Web site: U.S. Department of Energy - Office of History and Heritage Resources - The Manhattan Project - The Atomic Bombing of Hiroshima, August 6, 1945. Oct 01, 2025
Revised the Top Questions section. Jul 14, 2025
Add new Web site: National Center for Biotechnology Information - A Comparison of Hiroshima and Nagasaki. Jun 16, 2025
Add new Web site: Imperial War Museums - Why did America drop two atomic bombs on Japan? Apr 25, 2025
Questions and answers added. Jan 30, 2025
Questions and answers added. Jan 17, 2025
Add new Web site: University of Michigan Library - Deep Blue Repositories - The Body at the Center - The Effects of the Atomic Bomb on Hiroshima and Nagasaki. Nov 18, 2024
Add new Web site: ICAN - Hiroshima and Nagasaki bombings. Jul 29, 2024
Added cross-references. Jun 21, 2024
Add new Web site: Atomicarchive.com - The Atomic Bombings of Hiroshima and Nagasaki. Jun 18, 2024
Add new Web site: World Nuclear Association - Hiroshima, Nagasaki, and Subsequent Weapons Testing. May 07, 2024
Add new Web site: Academia - Hiroshima and Nagasaki: a case of Unpunished War Crimes. Nov 17, 2023
Media added. Jul 18, 2023
Media added. Jul 17, 2023
Add new Web site: Live Science - The first atomic bombs: Hiroshima and Nagasaki. Jun 28, 2023
Add new Web site: Atomic Heritage Foundation - Bombings of Hiroshima and Nagasaki - 1945. Dec 03, 2022
New article added. May 03, 2021
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