March 18 - World War II: 1,250 American bombers attack Berlin.
March 19 - World War II: Adolf Hitler orders that all industries, military installations, shops, transportation facilities and communications facilities in Germany be destroyed.
April 28 - Italian dictator Benito Mussolini and his mistress, Clara Petacci, are hanged upside down by Italian partisans as they attempt to flee the country.
May 7 - World War II: General Alfred Jodl signs unconditional surrender terms at Reims, France, ending Germany's participation in the war. The document will take effect the next day.
May 8 - World War II: British 8th Army together with Slovene partisan troops and motorized detachment of Yugoslav 4th Army arrives to Carinthia and Klagenfurt.
May 8-29 - In Algeria, French troops and released Italian POWs defeat rebellion of Algerians
May 9 - World War II: General Alexander Löhr Commander of German Army Group E near Topolšica, Slovenia, signs capitulation of German occupation troops.
May 25 - In Atlantic, ships can finally keep their lights lit. Szilard begs Harry S. Truman not to use the bomb.
May 28 - William Joyce, known as "Lord Haw-Haw" is captured. He is later charged with high treason in London for his English-language wartime broadcasts on German radio. He is hanged in January of 1946.
May 29 - Group of German communists, Ulbricht in the lead, arrive in Berlin
May 30 - Iranian government demands that Soviet and British troops leave the country
June 11 - William Lyon Mackenzie King is reelected as Canadian prime minister. Franck Committee recommends against a surprise nuclear bombing of Japan.
July 26 - Winston Churchill resigns as Britain's prime minister after his Conservative Party is soundly defeated by the Labour Party. Clement Attlee becomes the new prime minister. Potsdam Declaration demands Japan's unconditional surrender; Article 12 permitting Japan to retain the Emperor had been deleted by Truman.
July 29 - Bomber accidentally hits Empire State Building on the 78 floor - upper floors burst to fire but the building remains standing. About 20 dead.
July 30 - World War II: The USS Indianapolis is hit and sunk by an I-58 Japanese submarine. Some 900 survivors jump into the sea and are adrift for 4 days. Nearly 600 die before help arrives. Captain Charles Butler MacVey III is later court-martialed.
August 6 - World War II: The United States detonates an atomic bomb nicknamed "Little Boy" on Hiroshima, Japan at 8:16 AM (local time) killing about 10,000 citizens immediately, 60,000 from injuries and sickness before the end of 1945, and 140,000 total from a mixture of radition sickness, injuries, and instant death from the bomb.
August 8 - The United Nations Charter is ratified by the United States, and that nation becomes the first to join the new international organization. Soviets declare war on Japan.
August 9 - World War II: The United States detonates an atomic bomb nicknamed "Fat Man" over the city of Nagasaki, Japan at 11:02 AM (local time) with an equivalent force of 22,000 tons of TNT. An estimated 80,000 are killed and more than 60,000 are injured. The bomb was orginally meant for the nearby city of Kokura, but bad weather impared the bomber's visual contact with the city. After several failed tries they diverted to their back-up target, Nagasaki. World War II: The Soviet Union begins its offensive against Japan in the then Japanese controlled Chinese region of Manchuria.
August 17 - Indonesian nationalists Sukarno and Mohammed Hatta declare the independence of Republic of Indonesia, Sukarno as a president. Dutch colonial authorities do not approve
November - Assembly of the world's first general purpose electronic computer, the Electronic Numerical Integrator Analyzer and Computer (ENIAC), is completed. It covers 1800 feet of floor space. The first set of calculations is run on the computer.
Bebop begins to emerge as popular style of jazz to contrast music of the big bands. Development of bebop is attributed in large part to trumpeter Dizzy Gillespie and alto saxophonist Charlie Parker
Team led by Charles DuBois Coryell discovers element 61, the only one still missing between 1 and 96 on Periodic Table. New element is called promethium