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  1. Manhattan District The Trinity test of the Manhattan Project on 16 July 1945 was the first detonation of a nuclear weapon. Active 1942–1946 Disbanded 15 August 1947 Country United States United Kingdom Canada Branch U.S. Army Corps of Engineers Garrison/HQ Oak Ridge, Tennessee, U.S. Anniversaries 13 August 1942 Engagements Allied invasion of Italy Allied invasion of France Allied invasion of ...

  2. Nov 1, 2013 · Let’s just take a moment to marvel at this. They went from pretty much just talking about a bomb, in theory, on paper, in late 1942, and had a project with 125,310 active employees at its peak, 22 months later. That’s a huge ramp-up. I like this graph because it helps you see, very plainly, the progress of the project.

  3. The Manhattan Project - Statistics & Facts. The Manhattan Project was a United States research and development program during the Second World War that resulted in the creation and detonation of ...

  4. Jul 26, 2017 · The OSRD formed the Manhattan Engineer District in 1942 and based it in the New York City borough of the same name. U.S. Army Colonel Leslie R. Groves was appointed to lead the project.. Fermi and ...

  5. At its peak, the Manhattan Project employed 130,000 Americans at thirty-seven facilities across the country. On July 16, 1945 the first nuclear bomb was detonated in the early morning darkness at a military test-facility at Alamogordo, New Mexico. The intense brightness of the explosion’s flash was followed by the rise of a large mushroom ...

  6. 2 days ago · Manhattan Project, U.S. government research project (1942–45) that produced the first atomic bombs. The project’s name was derived from its initial location at Columbia University, where much of the early research was done. The first bomb was exploded in a test at Alamogordo air base in southern New Mexico on July 16, 1945.

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  8. Feb 21, 2024 · Maps. More than 500,000 people contributed to the Manhattan Project including workers, scientists, engineers, and political leaders. The Manhattan Project affected hundreds of thousands more through the world’s first nuclear detonation and the atomic bombings of Japan in 1945. Since then, Manhattan Project legacies have unfolded to produce ...

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