The events and anniversaries: Defence: 1587 - Sir Francis Drake sinks the Spanish fleet in Cádiz harbor. Report: 1775 - American Revolutionary War: The Battle of Lexington and Concord which began the American Revolutionary War. Civil Aviation: 1919 - Leslie Irvin of the United States makes the first successful voluntary free-fall parachute jump using a new kind of self-contained parachute. Defence:...