This timeline details Oppenheimer's pivotal role in the Manhattan Project, from its inception to the development of the atomic bomb.
Initial Involvement
October 1941
President Franklin D. Roosevelt approved a crash program to develop an atomic bomb, and Oppenheimer was brought into the project by Ernest Lawrence.
Coordinator of Rapid Rupture
May 1942
Oppenheimer was tasked with work on fast neutron calculations and was given the title 'Coordinator of Rapid Rupture'.
Establishment of the Manhattan Project
September 1942
General Leslie Groves took charge of the project, and Oppenheimer was appointed as the Director of the Los Alamos Laboratory.
Director of Los Alamos Laboratory
1943-1945
Oppenheimer led the team at Los Alamos, overseeing the development of the atomic bomb. The team successfully developed and tested the bomb in just 27 months.
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