March 1

• March 1, 293
  Roman emperor Diocletian introduces tetrarchy, dividing power among four individuals and marking the end of the Crisis of the Third Century and the recovery of the Roman Empire
• March 1, 1260
  Hulagu Khan, a grandson of Genghis Khan, conquers Damascus
• March 1, 1562
  Over 80 Huguenots, members of the Protestant Reformed Church of France, are massacred by the ultra-Catholic Duke of Guise Francis in Wassy-sur-Blaise, marking the start of the First War of Religion in France
• March 1, 1565
  Estácio de Sá, a Portuguese soldier and officer, founds Rio de Janeiro in Brazil as the basis of military operations against the France Antarctique colony
• March 1, 1579
  Sir Francis Drake waylaid a Spanish treasure galleon, the Nuestra Señora de la Concepción, off the coast of Panama
• March 1, 1801
  The London stock exchange is founded, with still the only British government debt traded
• March 1, 1811
  In Egypt the Ottoman viceroy Muhammad Ali Pasha massacres the Mameluke leaders of Egypt, invited to a banquet at the citadel of Cairo in honor of his son, for plotting against him
• March 1, 1864
  Louis Arthur Ducos du Hauron patents a movie machine that was never built
• March 1, 1872
  Yellowstone National Park, the world's first national park, is established under the act signed into law by President Ulysses Grant
• March 1, 1896
  Ethiopia defeats Italy at the Battle of Adwa during the First Italo-Ethiopian War and ensures the first victory of an African state over a European colonial power
• March 1, 1910
  An avalanche of snow hits two trains stranded for seven days outside the Cascade Tunnel below Stevens Pass, near Wellington, Washington, USA, killing 96 and becomes the deadliest one in United States history
• March 1, 1934
  Puyi, the last Emperor of China, is crowned emperor of Manchuria
• March 1, 1936
  Hoover Dam, a concrete arch-gravity dam in the Black Canyon of the Colorado River, is completed
• March 1, 1938
  Detective Comics pays Jerome Siegel and Joe Shuster $130 to transfer exclusive rights to the use of the comic character "Superman", who has its first appearance in comics
• March 1, 1995
  Yahoo! web site is founded in Santa Clara, California
• March 1, 2007
  International Polar Year, a US$1.5 billion research program to study both the North Pole and South Pole, is launched in Paris, France