June 26

• June 26, 363
  Roman Emperor Julian receives a mortal wound in battle with the Sassanian Persians during battle of Samarra. Jovian succeeds
• June 26, 1541
  Francisco Pizarro, the Spanish Conqueror of Peru, is murdered by his former followers in Lima
• June 26, 1630
  Sweden enters the German wars, as King Gustavus Adolphus and 13,000 men, comprised of mostly Swedes, with some Scottish and Irish mercenaries, land on the island of Usedom off the Pomeranian coast after Imperial intervention in Poland
• June 26, 1721
  Dr. Zabdiel Boylston gives the first smallpox inoculation in Boston during the epidemic that has arrived by ship from Barbados
• June 26, 1794
  French defeat the Coalition Army at the Battle of Fleurus
• June 26, 1830
  Britainэs King George IV dies and is succeeded by his brother, King William IV
• June 26, 1894
  The American Railway Union with 125,000 workers, led by Eugene V. Debs, calls a general strike in sympathy with Pullman workers that blocked freight traffic in and out of Chicago
• June 26, 1909
  The Science Museum in London comes into existence as an independent entity
• June 26, 1924
  After eight years of occupation, United States troops leave the Dominican Republic
• June 26, 1936
  The Focke-Wulf Fw 61, the first practical helicopter, flies for the first time in Germany
• June 26, 1945
  United Nations Charter, the foundational treaty of the United Nations, is signed by 50 nations in San Francisco, California, United States
• June 26, 1948
  U.S. and British pilots begin delivering food and supplies by airplane to West Berlin after the city is isolated by a Soviet Union blockade
• June 26, 1963
  USA President John F. Kennedy speaks the famous words "Ich bin ein Berliner", which means I am a Berliner, on a visit to West Berlin
• June 26, 1974
  The Universal Product Code, a barcode symbology, is scanned for the first time, to sell a pack of chewing gum in Ohio
• June 26, 1976
  The CN Tower, the world's tallest free-standing land-based structure, opens in Toronto, Canada
• June 26, 1997
  Harry Potter and the Philosopher's Stone, the first novel about a young wizard Harry Potter by British author J. K. Rowling, is released
• June 26, 2000
  A 'rough draft' of the genome, as part of the Human Genome Project, an international scientific research project with a primary goal of determining the sequence of chemical base pairs which make up DNA, is finished