June 11

• June 11, 1719
  Spanish attempt to restart the Jacobite rebellion fails after Scottish rebels, aided by Spanish troops, who are defeated at Glen Shiel surrender
• June 11, 1727
  George I dies on a journey to Hanover, George II becomes king of England
• June 11, 1742
  Austria cedes most of Silesia to Prussia by Treaty of Breslau, ending the First Silesian War
• June 11, 1770
  Captain James Cook, commander of the British ship Endeavour, discovers the Great Barrier Reef off Australia by running onto it
• June 11, 1795
  In Tripoli Pasha Yusuf Karamanli deposes his older brother Hamet in a bloodless coup in Ottoman Tripolitania
• June 11, 1798
  Napoleon captures Malta on his way to Egypt and expels the Knights Hospitaller of Malta from their base
• June 11, 1858
  Saint Isaac's Cathedral, the largest orthodox basilica, built by the French-born architect Auguste de Montferrand in Saint Petersburg, is opened
• June 11, 1898
  Guangxu Emperor of China began Hundred Days' Reform in effort to modernize China, but conservative forces soon squelch the attempt
• June 11, 1901
  Cook Islands are annexed and proclaimed part of New Zealand
• June 11, 1935
  Edwin Armstrong demonstrates FM broadcasting, broadcasting technology that uses the encoding of information in a carrier wave by varying the instantaneous frequency of the wave, for the first time
• June 11, 1963
  Thich Quảng Duc, Buddhist monk, immolates himself on a street in Saigon as a protest against the persecution of Buddhists by the South Vietnamese government
• June 11, 1975
  A democratic and republican Constitution of Greece is promulgated
• June 11, 2008
  Fermi Gamma-ray Space Telescope is launched
• June 11, 2009
  The World Health Organization declares the H1N1 influenza has reached the pandemic level, the first time it has called a global flu epidemic in 41 years