September 1st 1878
Cincinnati's first telephone exchange opens just two years after Alexander Graham Bell made the first phone call and said, "Mr. Watson, come here! I want to see you!". The invention took off but not his suggested greeting of "Ahoy".
September 3rd 1925
The first US airship the USS Shenandoah, crashed in Noble County OH. This disaster predated the Hindenburg tragedy by 12 years.
September 6th 1791
Arthur St Clair and 4,128 troops leave Ft Washington in Cincinnati to engage Indians. Only about 1,000 made it due to desertion, poor leadership and gout. They were soundly whooped in what became known as St Clair's Defeat, an overwhelming Indian victory against the US.
September 10th 1813
Commodore "He's a brick house, he's mighty mighty" Perry wins the Battle of Lake Erie in the War of 1812. Control of the lake from the British ultimately led to a US victory in the war that everyone forgot. While it's true that most historians consider the war a draw, this left the Indians in the US without a European ally for the first time in hundreds of years. This greatly accelerated the US sweep across the continent.
September 14th 1901
Fulfilling Tecumseh's Revenge (not really), Ohio born US President William McKinley, Jr., died after being shot by an assassin eight days earlier.
Future fattest US President ever William Howard Taft is born in Cincinnati OH.
September 18th 1932
Not able to catch a break in the booming film industry, stage actress Peg Entwhistle infamously jumps from the H on the Hollywood sign and dies. She is buried in Cincinnati OH.
Also fulfilling Tecumseh's Revenge (ok maybe there is something to this), Ohio born US President James Garfield dies from gunshot wounds and bad doctors. September was a terrible month for Ohio US Presidents.
The wildly exaggerated life of Daniel Boone who was a man, a big man with an eye like an eagle and as tall as a mountain, comes to an end. Boone participated in many military expeditions into Ohio against the Shawnee.