The Siege of Boston, which began in 1775, ended in 1776 when
the Continental army left Boston.
the British allowed supplies to enter Boston.
the British were forced to leave Boston.
the Olive Branch Petition was signed.

The siege began on April 19, 1775, when British troops retreated to Boston after the Battles of Lexington and Concord, during which the Shot Heard Round the World had taken place, and ended on March 17, 1776 when the British finally fled Boston by sea.

Explanation:

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