Manhattan Project
Vannevar Bush holds a meeting to organize an accelerated research project, managed by Arthur Compton, Harold Urey develops research into gaseous diffusion as uranium enrichment & Ernest Lawrence investigates separation methods
Permanent historical records · Updated 2026-11-03
1941 in United States of America — Page 3
Explore 161 historical events and records for United States of America in 1941.
Historical records for United States of America in 1941
Sorted by month and day. Records with no month are shown last. Showing 40 of 161 unique records.
161Unique records
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24Named events on this page
17Named people on this page
5Places on this page
December
Manhattan Project
Organises accelerated American uranium research.
Manhattan Project
Vannevar Bush holds a meeting to organize an accelerated research project, managed by Arthur Compton, Harold Urey develops research into gaseous diffusion as uranium enrichment & Ernest Lawrence investigates separation methods
Manhattan Project
Vannevar Bush holds a meeting to organize an accelerated research project, managed by Arthur Compton, Harold Urey develops research into gaseous diffusion as uranium enrichment & Ernest Lawrence investigates separation methods
Manhattan Project
Vannevar Bush holds a meeting to organize an accelerated research project, managed by Arthur Compton, Harold Urey develops research into gaseous diffusion as uranium enrichment & Ernest Lawrence investigates separation methods
Manhattan Project
Vannevar Bush holds a meeting to organize an accelerated research project, managed by Arthur Compton, Harold Urey develops research into gaseous diffusion as uranium enrichment & Ernest Lawrence investigates separation methods
Uranium Enrichment
Develops gaseous-diffusion research for uranium enrichment.
Bombing of Pearl Harbour
Broadcasts warning messages but atmospheric conditions delay them by 10 hours
Bombing of Pearl Harbour
The Japanese bomb Pearl Harbor sinking or damaging 18 ships. The bombing of Pearl Harbour bring the US into World War II
Declaration of War
The USA declares War on Japan
Declaration of War
Romania declares war on the USA
Declaration of War
The USA declares war on Germany
Commander of Pacific Fleet
Appointed Commander of the Pacific Fleet after the attack on Pearl Harbour
Commander of Pacific Fleet
Appointed Commander of the Pacific Fleet after the attack on Pearl Harbour
Manhattan Project
First meeting of the OSRD sponsored S-1 project, dedicated to developing fission weapons
Manhattan Project
OSRD research includes radar, guided missiles and fission weapons.
Office of Scientific Research and Development
Directs wartime scientific projects including radar and early-warning systems.
Office of Scientific Research and Development
OSRD sponsors radar, proximity fuze and nuclear research during the war.
S-1 Section
OSRD coordinates weapons research while radar projects expand separately.
Conscription
The Selective Service Act requires all men aged 18-64 register, men aged 20-44 are liable to conscription
Legislation
The Selective Service Act requires all men aged 18-64 register, men aged 20-44 are liable to conscription
Chief Naval Operations
Appointed Chief of Naval Operations
Conference of Arcadia
Churchill travels to the US to discuss Anglo-American strategy and priorities with Roosevelt, the Arcadia conference formally endorses the Allies Germany First policy
International Conference at Arcadia
Churchill travels to the US to discuss Anglo-American strategy and priorities with Roosevelt, the Arcadia conference formally endorses the Allies Germany First policy
Siege of Luzon
Transferred to Bataan to deny the Japanese the control of Luzon
Conference of Washington
Declares, "When Germany is defeated, the collapse of Italy & Japan will follow"
Major General
Appointed Major General
Major General
Appointed Major General
Other events (month unknown)
Academy Award
Stars in, "Sergeant York" & wins an Academy Award for Best Actor
Army Infantry School
Appoinred Commandant of the United States Army Infantry School
Arrival in New York
Arendt reached the United States and began building an intellectual career in exile.
Assistant Secretary of State
Appointed Assistant Secretary of State
Battle of Pearl Harbour
Commander of US Pacific Fleet during the Battle of Pearl Harbour
Brigadier General
Appointed Brigadier General
Brigadier General
Appointed Brigadier General
Brigadier General
Appointed Brigadier General
Brigadier General
Appointed Brigadier General
Chief Infantry
Appointed Chief of Infantry, War Department
Citizen Kane
Citizen Kane, Orson Welles first film with RKO, in which he starred in the role of Charles Foster Kane, is often considered the greatest film ever made
Commandant
Appoinred Commandant of the United States Army Infantry School
How these records were prepared
Generated from the World History Database historical_events table. Identical display records are collapsed; descriptions otherwise retain the stored text. Coverage and source quality vary. Check primary and specialist sources before citing individual historical claims.