When Was the Declaration of Independence Signed?

August 2, 1776

Explanation:

Independence was formally declared on July 2, 1776, a date that John Adams believed would be “the most memorable epocha in the history of America.” On July 4, 1776, Congress approved the final text of the Declaration. It wasn't signed until August 2, 1776.

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these civilizations were located around fertile rivers, where they could produce an abundance of crops