May 6: Six U-boats are sunk after sinking 12 ships from Convoy ONS 5 in the last major North Atlantic U-boat "wolfpack" attack of the war.

May 9-12: Japanese troops carry out the Changjiao massacre in Changjiao, Hunan, China.

May 11: American troops invade Attu in the Aleutian Islands, in an attempt to expel occupying Japanese forces.

May 12: The Trident Conference begins in Washington, D.C., with Franklin D. Roosevelt and Winston Churchill taking part.

May 13: German Afrika Korps and Italian troops in North Africa surrender to Allied forces.

May 14: The Australian Hospital Ship Centaur is sunk off the coast of Queensland by a Japanese submarine. - 358th Bombardment Squadron, 303d Bombardment Group B-17F Hell's Angels is the first USAAF bomber to complete 25 missions.

May 15: The Comintern is dissolved in Moscow.

May 16-17: Operation Chastise (the 'Dambuster Raid') takes place: No. 617 Squadron RAF use bouncing bombs to breach German dams in the Ruhr Valley.

May 16: The Warsaw Ghetto Uprising ends.

May 17: The United States Army contracts with the University of Pennsylvania's Moore School to develop the computer ENIAC. - The Memphis Belle's crew becomes the first aircrew in the 8th Air Force to complete its 25-mission tour of duty. The aircraft and crew are the first to return to the U.S. intact for a War Bond drive.

May 19: Winston Churchill addresses a joint session of the United States Congress.

May 29: Norman Rockwell's illustration of Rosie the Riveter first appears on the cover of the Saturday Evening Post.

May 30: Dr. Josef Mengele begins his service as a medical officer in the Auschwitz-Birkenau concentration camp. (source: Wikipedia)