The Freedmen's Bureau was the agency created by the U.S congress, it was used to help poor people, and to give them supplies. This was done so that the result would be healthy people that would contribute to the economy.
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The British came to Lexington and Concord and it was the response of the British to colonists' rebellious actions
Constantinople's name was changed to Istanbul after the Ottomans defeated it in 1453.
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I believe Hannible crossed the alps to invade Rome.