What happened on the ides of March?

Julius Caesar, dictator of Rome, is stabbed to death in the Roman Senate house by 60 conspirators led by Marcus Junius Brutus and Gaius Cassius Longinus on March 15. The day later become known as the Ides of March.

Explanation:

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mining and farming towns developed

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4 copper and gold, the california gold rush is why im pretty sure.