27 July History
- 1214 - At the Battle of Bouvines in France, Philip Augustus of France defeats John of England.
- 1245 - Frederick II is deposed by a council at Lyons, which found him guilty of sacrilege.
- 1586 - Sir Walter Raleigh returns to England from Virginia.
- 1663 - British Parliament passes a second Navigation Act, requiring all goods bound for the colonies be sent in British ships from British ports.
- 1689 - Government forces defeat the Scottish Jacobites at the Battle of Killiecrankie.
- 1777 - The Marquis of Lafayette arrives in New England to help fight the British.
- 1778 - British and French fleets fight to a standoff in the first Battle of Ushant.
- 1793 - Robespierre becomes a member of the Committee of Public Safety.
- 1861 - President Abraham Lincoln replaces General Irwin McDowell with General George B. McClellen as head of the Army of the Potomac.
- 1905 - The International Workers of the World found their labor organization in Chicago.
- 1909 - Orville Wright sets a world record for staying aloft in an airplane–one hour, 12 minutes and 40 seconds.
- 1914 - British troops invade the streets of Dublin, Ireland, and begin to disarm Irish rebels.
- 1921 - Canadians Sir Frederick Banting and Charles Best isolate insulin at the University of Toronto.
- 1944 - U.S. troops complete the liberation of Guam.
- 1953 - Representatives of the United Nations, Korea and China sign an armistice at Panmunjon, Korea.
- 1964 - President Lyndon Johnson sends an additional 5,000 advisers to South Vietnam.
- 1993 - Israeli guns and aircraft pound southern Lebanon in reprisal for rocket attacks by Hezbollah guerrillas.
27 July Birthdays
- 1768 - Charlotte Corday, French revolutionary, assassin of Jean Paul Marat.
- 1777 - Thomas Campbell, Scottish writer (The Pleasures of Hope).
- 1870 - Hilaire Belloc, French writer (Cautionary Tales).
- 1906 - Leo Durocher, baseball player and manager.
- 1908 - Joseph Mitchell, writer for The New Yorker.
- 1930 - David Hughes, English novelist (The Horsehair Sofa, The Man Who Invented Tomorrow).
- 1939 - Michael Longley, Irish poet.
- 1940 - Bharati Mukherjee, Indian novelist (The Middleman and Other Stories).