August 27

• August 27, 1626
  Danish forces and allies are soundly defeated at Lutter-am-Barenberg by an army of the Catholic League under Czech leader Wallenstein, marking the end of Danish intervention in European wars
• August 27, 1689
  Peter the Great takes power from his half-sister Sophia and assumes Russian throne, starting politics of modernization and westernization of traditionalist social systems
• August 27, 1776
  The Americans are defeated by the British at the Battle of Long Island, New York
• August 27, 1783
  The first unmanned hydrogen balloon flight, made by Jacques Charles, successfully completes its flight in Paris reaching 900 meter altitude
• August 27, 1813
  Napoleon defeat The Allies at the Battle of Dresden
• August 27, 1849
  Venice, under Daniele Manin, surrender to Austrians under Field Marshal Radetzky, following a siege since July 20 after proclaiming independence
• August 27, 1883
  Explosion of volcano with a force of 1,300 megatons on the island Krakatoa causes the tidal waves in Indonesia's Sunda Strait, which claims some 36,417 lives in Java and Sumatra
• August 27, 1896
  Zanzibar loses to England in a 38-minute war, the shortest war in history, which begins after the death of the pro-British Sultan Hamad bin Thuwaini and the succession of Sultan Khalid bin Barghash
• August 27, 1913
  Lieutenant Peter Nestrov, of Imperial Russian Air Service, performs a loop in a monoplane at Kiev, the first aerobatic maneuver in an airplane
• August 27, 1928
  Kellogg–Briand Pact is signed by the USA, Belgium, Czechoslovakia, Great Britain, Germany, Italy, Japan, and Poland, renouncing war as an instrument of national policy in relations with one another
• August 27, 1939
  Heinkel He 178, the world's first aircraft to fly under turbojet power, makes the first flight, piloted by Erich Warsit