Joseph Brant's forces. July 24 – American Revolutionary War – American forces, led by Commodore Dudley Saltonstall, launch the Penobscot Expedition in what is now Castine, Maine, resulting in the worst naval defeat in U.S. history (until Pearl Harbor). July – The Great Siege of Gibraltar (fourteenth and last military siege) begins. This is an action by French and Spanish forces to wrest control of Gibraltar from the established British garrison. The garrison, led by George Augustus Eliott (later 1st Baron Heathfield of Gibraltar), survives all attacks and a blockade of supplies. September Battle of Baton Rouge – Spanish troops under Bernardo de Gálvez capture the city from the British. The Great Siege of Gibraltar starts, the longest siege endured by the British Armed Forces. September 14–15 – American Revolutionary War – Little Beard's Town, a loyalist stronghold, is burnt by the Sullivan Expedition. September 23 – American Revolutionary War – Battle of Flamborough Head – The American ship Bonhomme Richard, commanded by John Paul Jones, engages the British ship . The Bonhomme Richard sinks, but the Americans board the Serapis and other vessels, and are victorious. September 28 – Samuel Huntington is elected as the seventh President of the Continental Congress. October–December October 1 – The city of Tampere, Finland (belonging to Sweden at this time) is founded by King Gustav III of Sweden. October 4 – The Fort Wilson Riot against James Wilson and others in Philadelphia takes place. November 2 – The North Carolina General Assembly carves a new county from Dobbs County, North Carolina and names it Wayne County, in honor of United States General Anthony Wayne. December 13 – Alexandre, Vicomte de Beauharnais marries Joséphine Tascher. December 25 – Fort Nashborough (later to become Nashville, Tennessee) is founded by James Robertson. December 31 – Affair of Fielding and Bylandt: Following a brief naval engagement between the British and Dutch off the Isle of Wight, the Dutch merchantmen and naval vessels are captured and taken to Portsmouth, England. Date unknown Industrial Revolution in England: The Iron Bridge is erected across the River Severn in Shropshire, the world's first bridge built entirely of cast iron. It will open to traffic on January 1, 1781. The spinning mule is perfected by Lancashire inventor Samuel Crompton. Boulton and Watt's Smethwick Engine, now the oldest working engine in the world, is brought into service (May)). A joint Spanish-Portuguese survey of