1941 ⟶ President Roosevelt Authorizes Funds for Manhattan Project
President Roosevelt authorizes $6,000 For Executive Order 88...
Year
1939
1941
1942
✉️ Einstein-Szilard Letter Sent to Roosevelt
The Einstein–Szilard letter is sent to President Roosevelt. Written by Leo Szilard and signed by Albert Einstein, it warned of the danger that Germany might develop atomic bombs. This letter prompted action by Roosevelt and eventually resulted in the Manhattan Project.⟶
USEinsteinSzilardRooseveltAtomic BombManhattan ProjectScienceGermanyNuclearWar
☢️ President Roosevelt Authorizes Funds for Manhattan Project
President Roosevelt authorizes $6,000 For Executive Order 8807 (Manhattan Project-Nuclear Weapons).⟶
United StatesManhattan ProjectNuclear WeaponsAtomic BombResearch and DevelopmentWorld War IIScientific AdvancementExecutive Order 8807Roosevelt
⚛️ Manhattan Project Launched
The Manhattan Project is started, the beginning of a scientific approach to nuclear weapons in the US, building on research work done in the UK.⟶
Manhattan ProjectNuclear WeaponsScientific ResearchUS HistoryMilitary TechnologyWorld War IIAtomic Bomb
⚛️ Manhattan Project Officially Begins
Manhattan Engineering District is formally created, full-effort development of the atomic bomb and production of nuclear fuels is begun.⟶
Manhattan ProjectAtomic BombNuclear WeaponsUnited StatesWorld War IIScienceTechnologyWarfare