Led Zeppelin started their first tour at Ulster Hall, Belfast, UK.
Source
The Boston Massacre occurred.
The battle of the Ruhr campaign began during WWII with an air raid in Essen, Germany.
Colorado became the birthplace of the cheeseburger.
The world's favorite paper joiner, the stapler was patented by C. H. Gould in England.
Country music stars Patsy Cline, Cowboy Copas, and Hawkshaw Hawkins all perished in an airplane crash.
