Calendar and Summary for August 1943  
 
SUN   MON   TUE   WED   THU   FRI   SAT
1   2   3   4   5   6   7
8   9   10   11   12   13   14
15   16   17   18   19   20   21
22   23   24   25   26   27   28
29   30   31                
 
   
  July 1943 September 1943  
   
  Summary of Significant Events for August 1943  
   
  The Japanese announced recognition of an independent Burma and a declaration of war by Burma against Great Britain and the United States.  The U.S. Army Air Force conducted a daylight bombing raid on the Ploesti oil fields in Romania on what became known as “Black Sunday.”  The Harlem Riot of 1943 took place in New York City.  PT-109, commanded by Lt. John F. Kennedy, was on picket duty when it was cut in half by the Japanese destroyer IJN Amagiri.  The prisoners at the Treblinka concentration camp rebelled.  Lt. General George S. Patton slapped several soldiers at military hospitals in Sicily and nearly ended his military career.  American forces captured Munda and its air field on New Georgia.  The U.S. Navy won the Battle of Vela Gulf.  The strategic conference codenamed Quadrant was held in Quebec City, Canada.  Over 34,000 U.S. and Canadian troops made an amphibious landing on unoccupied Kiska Island in the Aleutian Islands.  The Allies occupied Messina completing the capture of Sicily.  Resistance groups in the Bialystok ghetto in Poland rebelled.  The Allies met with Italian representatives in Lisbon to discuss the surrender of Italy.  The Red Army liberated Kharkov.  The last Japanese resistance on New Georgia was eliminated.  After weeks of rioting and strikes the Danish government fell and Denmark was placed under martial law by the Germans.  26 ships (93,069 tons) were sunk and 4 ships (18,194 tons) were damaged by U-boats and mines during August 1943.  
   
  Events occurring in August 1943 with no specific dates  
   
  The Atomic Bombs  
  Despite the efforts of more than 1,000 researchers at Kellex and Columbia University, no suitable diffusion barrier material had yet been developed.  
   
  Due to lagging progress on gaseous diffusion, and continuing uncertainties about the required amount of U-235 for a bomb, Brigadier General Leslie R. Groves decided to double the size of the Y-12 electromagnetic plant at Oak Ridge, Tennessee.  
   
  The first Alpha electromagnetic uranium separation unit began operation. Construction staff at Oak Ridge now exceeded 20,000.  
   
  Construction began on the cooling systems for the production reactors at Hanford, Washington. Construction staff is about 5,000.
  Learn more about the American Atomic Bombs Program  
 
     
   
     
   
 

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