The Treaty of Florence was signed, which ended the war between the French Republic and the Kingdom of Naples.
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Frenchman Henri Fabre flew the world's first seaplane in Martinique, France.
A nuclear disaster occurred at Three Mile Island in Pennsylvania, US.
Bank of Tokyo and Mitsubishi Bank merged to become the world's largest bank.
The European Union Parliament declared single-use plastics were to be banned by 2021.
The Vienna Philharmonic Orchestra performed its first concert.
