100% verified The same day, three eras.

10 January

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Contemporary era

1863

First London Underground line opens

On 10 January 1863, the Metropolitan Railway opened the world's first underground railway in London.

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Contemporary era

1840

Birth of the Penny Post

On 10 January 1840, the United Kingdom introduced the uniform penny postage, the first modern mass postal service.

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Antiquity

c. 49 BC

Caesar crosses the Rubicon

Around 10 January 49 BC, Julius Caesar crossed the Rubicon under arms, triggering the Roman civil war.

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