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Col. Groves
Groves takes charge of atomic bomb developement. -
Period: to
Manhattan Project
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Dr. J. Robert Oppenheimer
Groves askes Oppenheimer to take control of the central lab or "Site Y." -
Los Alamos
Groves and Oppenheimer decide Site Y will be in Los Alamos, New Mexico. -
Chicago Pile-1
The first nuclear reactor at Chicago University goes critical. -
Y12
Construction of a massive electromagneitc separation platn begins at Oak Ridge, Tennessee. -
University of California
The University of California becomes the official business manager of the Los Alamos lab. -
Hanford Site
Construction of the Hanford Site, a nuclear production complex, begins in Columbia River, Washington. -
RaLa Test
The first RaLa test with a radioactive source is performed. A RaLa test is used to study the converging shock waves in the center of a simulated nuclear device. RaLa stands for Radioactive Lanthanum. -
509 Composite Group
509th Composite Group of USAAF constituted to deliver the bombs. -
Fat Man
First successful test of the explosive lens used in Fat Man. -
Target Committee
Second meeting of the target committee. They discussed the altitude at which the bomb should be detonated and which city should be the target. -
Trinity Test
The first atomic bomb is tested at 5:29 a.m. -
Hiroshima
Hiroshima is hit by "The Little Boy" -
Nagasaki
Nagasaki is hit by the "Fat Man." Kokura, the primary target, was obscured by a cloud. -
Surrender
Japan officially surrenders to the Allied Powers.