Calendar and Summary for April 1944  
 
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  March 1944 May 1944  
   
  Summary of Significant Events for April 1944  
   
  The Red Army invaded Romania.  Operation "Tungsten" was conducted with aircraft Royal Navy aircraft bombing the German battleship SMS Tirpitz while she was in Norwegian waters.  Operation U-Go’s final objectives were achieved as the Japanese 33rd and 15th Divisions cut off Imphal.  General Bernard L. Montgomery held a review of Operation Overlord at his headquarters in London for senior military commanders and top British political figures.  Six RAF Mosquito fighter-bombers made a hit and run raid on Gestapo headquarters in The Hague, The Netherlands, causing heavy damage.  German Chancellor Adolf Hitler ordered the evacuation of the Crimea.  The Red Army liberated the Black Sea port of Yalta.  The Italian cabinet of Marshal Pietro Badoglio resigned, but King Victor Emmanuel III invited Marshal Badoglio to remain as Prime Minister and form a new government.  The beleaguered Allied garrison at Kohima was relieved by the 5th Brigade of the XXXIII Corps.  An Allied naval force struck at Japanese positions and shipping at Sabang, Netherland East Indies.  U.S. troops landed in Dutch New Guinea.  In Alexandria Egypt, British forces forcefully put down the Greek sailors mutiny.  U.S. Lt. General George S. Patton created a controversy when he implied that the Allies had plans for world domination in a speech to the Knutsford Welcome Club.  The first B-29 to encounter Japanese fighters in the China/Burma/India theatre occurred during a mission over the "Hump" ferrying fuel to the forward base in China.  A D-Day exercise at Slapton Sands near Devon off the southern coast of England turned tragic when German torpedo boats attacked a fleet of eight slow-moving U.S. ships carrying thousands of troops in English Channel’s icy waters.  11 ships (62,346 tons) were sunk and 1 ship (56 tons) was damaged by U-boats during April 1944.  
   
  Events occurring in April 1944 with no specific dates  
   
  The Atomic Bombs  
  Dr. J. Robert Oppenheimer informed Brigadier General Leslie R. Groves that Dr. Philip Abelson’s experiments on thermal diffusion at the Philadelphia Naval Yard deserved a closer look. Abelson was building a plant to produce enriched uranium to be completed in early July. It might be possible, Oppenheimer thought, to help Abelson complete and expand his plant and use its slightly enriched product as feed for the Y-12 electromagnetic plant at Oak Ridge, Tennessee until problems with K-25 power plant could be resolved.  
   
  IBM calculating equipment arrived at Los Alamos, New Mexico and was put to work on implosion research.  
   
  British physicist James Tuck suggested the idea of using explosive lenses to create spherical converging implosion waves.
  Learn more about the American Atomic Bombs Program  
 
     
   
     
   
 

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