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Events on Sunday 17 March 1776 1
1776British forces evacuate BostonSiege of Boston ends with British withdrawal by seaAfter an eleven-month siege, British troops under General William Howe evacuated Boston by sea following the Continental Army's fortification of Dorchester Heights with cannon captured at Fort Ticonderoga. The withdrawal gave the Continental Army its first major success of the Revolutionary War. The date is still observed as Evacuation Day in Massachusetts.