1842

Abraham Lincoln married Mary Todd in Springfield, Illinois.

The Treaty of Nanking was signed, ending the Opium Wars and ceding the island of Hong Kong to Britain.

A border dispute between the United States and Canada was resolved with the signing of the Webster-Ashburton Treaty.

Anesthesia was used for the first time in an operation.

A private mail service at New York City introduced the first adhesive postage stamps.

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