80 Years Ago—March 13, 1940: Canada forms Inventions Board to process weapon suggestions from civilians.
Canada discontinues manufacture of civilian trucks.
Punjabi nationalist Udham Singh assassinates former British governor Sir Michael O’Dwyer in London, in retaliation for 1919 Amritsar massacre.
75 Years Ago—Mar. 13, 1945: US B-29s launch fire raid on Osaka, killing 4000 and destroying 119 factories.
51st Field Hospital crosses the Rhine River at Remagen, Germany, the first US hospital to do so.
King Norodom Sihanouk declares Cambodian independence from France (under Japanese), changes name of country to Kampuchea, reinstates Khmer script, ending Romanization of Khmer language.