Calendar and Summary for March 1941  
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  February 1941 April 1941  
  Summary of Significant Events for March 1941  
  Tsar Boris III of Bulgaria signed the Tripartite Pact, officially entering the Axis with Germany, Japan, and Italy.  British commandos raided the Norwegian Lofoten Islands in an undertaking codenamed Operation Claymore.  The first soldiers of a British expeditionary force from North Africa arrived in Greece.  On March 7 U-boats sank 2 and damaged 4 merchant ships in Convoy OB-293 in the northern Atlantic Ocean. On March 8 U-boats sank 5 merchant ships in Convoy SL-67 off the western coast of Africa in the eastern Atlantic Ocean. The U-124, commanded by Kapitänleutnant Georg-Wilhelm Schulz, sank 4 of the ships.  Italy launched a full-scale counterattack across the entire Greek front.  Rear Admiral Takijirō Ōnishi presented Commander-in-Chief of the Combined Fleet Admiral Isoroku Yamamoto with a preliminary study for the attack on Pearl Harbor, based on Commander Minoru Genda's plan but with some modifications.  The U.S. Congress passed and U.S. President Franklin D. Roosevelt signed the Lend-Lease Act.  The final elements of the 5th Light Division of the Afrika Korps arrived in North Africa.  Nagao Kita, the coordinator of espionage in Hawaii, arrived in Honolulu.  On March 16 U-boats sank 6 merchant ships and damaged another in Convoy HX-112 in the northern Atlantic Ocean. The U-99, commanded by Korvettenkapitän Otto Kretschmer, was responsible for all of the ships that sank.  Major General Erwin Rommel attacked and reoccupied El Agheila, Libya in his first offensive.  Yugoslavia joined the Axis Tripartite Pact.  The heavy cruiser HMS York was badly damaged by 2 Italian explosive motor boats in a dawn attack at Suda Bay.  Two Serbian generals led a British-assisted coup against the Cvetkovic government.  The first of the RAF's Eagle squadrons, No. 71 Squadron, composed of volunteer American pilots operating under the British flag, became fully operational.  American and British military officials concluded a secret set of meetings in Washington, D.C. that developed the ABC-1 plan, outlining a common Anglo-American strategy for World War 2.  On March 29 the U-48, commanded by Kapitänleutnant Herbert Schultze, sank 3 merchant ships in Convoy HX-115 in the northern Atlantic Ocean.  The Afrika Korps began an offensive in Libya.  Crown Prince and Regent of Iraq Abd al-Ilāh learned of a plot to assassinate him and fled the country to Jordon. 40 ships (234,847 tons) were sunk and 10 ships (98,329 tons) were damaged by U-boats during March 1941.  
  Events occurring in March 1941 with no specific dates  
  The German Nuclear Research Program  
  German theoretical physicist Dr. Werner Heisenberg and the Berlin-Dahlem team reported on their first reactor experiments with layers of uranium oxide and paraffin in a cylindrical tank. The results were negative, and Heisenberg concluded that heavy water must be used.  

The objective of is to provide a day by day account of the events that lead up to and were part of the greatest conflict known to mankind. There are accounts for the activities of each particular day and timelines for subjects and personalities. It is the of this website intent to provide an unbiased account of the war. Analysis, effects caused by an event, or prior or subsequent pertinent events are presented separately and indicated as text that is italicized.

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