June 15

• June 15, 1094
  El Cid aka Rodrigo Díaz de Vivar, a Castilian nobleman and military leader, with a combined Christian and Moorish army conquest Valencia and becomes the ruler of Taifa of Valencia
• June 15, 1184
  King Magnus V of Norway is defeated by his rival, Sverre
• June 15, 1215
  King John of England affixes his royal seal to the Magna Carta, granting his barons more liberty and asserting the supremacy of the law over the king
• June 15, 1389
  Ottoman army under Murad I defeats Serbian army at the battle of Kosovo completing conquest of Serbia
• June 15, 1467
  Philip the Good Duke of Burgundy, dies at age 76
• June 15, 1658
  Aurangzeb, son of Mughal Emperor Shah-Jahan-e-Azam, deposes and imprisons his father, starting his reign lasted for 49 years and considered as an apex of Mughal Empire
• June 15, 1667
  Jean-Baptiste Denys, a French doctor, performs the first animal to human blood transfusion, transfusing nine ounces of blood from a lamb into 15-year-old boy
• June 15, 1703
  The Rákóczi Uprising against the Habsburg Monarchy becomes the first significant attempt to topple the rule of Habsburg Austria over Hungary
• June 15, 1733
  St. Croix island is purchased from the French by the Dutch West India and Guinea Company
• June 15, 1744
  The warship Centurion under British Commodore George Anson returns to England with a treasure
• June 15, 1775
  The Second Continental Congress vote unanimously to appoint George Washington head of the Continental Army
• June 15, 1785
  Two French balloonists, Jean-François Pilâtre de Rozier and Pierre Romain, die in world's first fatal aviation accident during flight across the English Channel
• June 15, 1844
  Charles Goodyear receives patent #3633 for the vulcanization of rubber, his process to strengthen rubber
• June 15, 1846
  The dispute between the United Staes and Great Britain over the Oregon country is settled by treaty, establishing the boundary at the 49th parallel
• June 15, 1878
  First attempt at motion pictures, using 12 cameras, each taking one picture, is done by Eadweard Muybridge to see if all four of a horse's hooves leave the ground at the same time
• June 15, 1888
  Wilhelm II becomes emperor of Germany
• June 15, 1896
  The Meiji Sanriku tsunami, triggered by magnitude 8.5 earthquake, strikes Japan and causes some 27,000 deaths and destroys 170 miles of coastline
• June 15, 1919
  Lieutenant Arthur Whitten Brown and Captain John Alcock complete the first trans-Atlantic non-stop flight, landing in Ireland
• June 15, 2000
  The June 15th North–South Joint Declaration is adopted between leaders of North and South Korea