Underwater test of an atomic bomb at Bikini atoll, Marshall Islands The first underwater test conducted by the U.S. of an atomic bomb at Bikini atoll in the Marshall Islands on July 25, 1946. (more) Marshall Islands atomic bomb tests Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/event/Marshall-Islands-atomic-bomb-tests Feedback Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login). Feedback Type Select a type (Required) Factual Correction Spelling/Grammar Correction Link Correction Additional Information Other Your Feedback Submit Feedback Thank you for your feedback Our editors will review what you’ve submitted and determine whether to revise the article.

　　External Websites Ask the Chatbot a Question Written by Written by Fid Backhouse and others Fid Backhouse is one of several contributors to 501 Most Devastating Disasters. Their work appears in Encyclopaedia Britannica as part of a joint publishing agreement with the publisher of 501... Fid Backhouse and others Fact-checked by Fact-checked by The Editors of Encyclopaedia Britannica Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree.... The Editors of Encyclopaedia Britannica Last Updated: Sep. 19, 2025 •Article History Table of Contents Table of Contents Ask the Chatbot testing of nuclear weapons carried out by the United States between July 1946 and August 1958 on Bikini and Enewetak atolls in the Marshall Islands. Tests were conducted from the air, from ships, and underwater. The United States plunged the world headlong into the Atomic Age by unleashing its devastating new invention on Hiroshima and Nagasaki to bring World War II to an apocalyptic conclusion. Although some of the nuclear scientists who had worked on the Manhattan Project researching the atom bomb, notably J. Robert Oppenheimer, strongly opposed further development and testing, the U.S. military believed their new weaponry was ...(100 of 481 words)

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