In April of 1775, the opening shots of the American Revolutionary War were fired at the village green of Lexington. Although the Declaration of Independence was still 15 months away, open conflict had started and it lit a powderkeg that would engulf all of the 13 colonies. 

As a result of the incidents in the towns west of Boston, the Colonial Army began a siege of British-held Boston, which was then on a peninsula. The siege would last nearly 11 months before the British forces of General Howe would withdraw by ships in March 1776, and sail to Nova Scotia. 

But the war between the British Empire and the 13 colonies had been brewing for quite some time. It all began with several hotheads from the Massachusetts Bay Colony. Massachusetts had been the scene of many acts of defiance, including the Boston Tea Party, the Boston Massacre and it generally was a hotbed of disdain for the occupying British Army (redcoats) who were stationed in Boston.

But the long-simmering feelings of resentment on both sides would ignite in April 1775. General Gage, the British military governor and commander, gave orders to 3,000 regulars to destroy the arms and powder of the Colonials in Concord with the hope that this would diffuse the situation and avoid open rebellion. It would have the opposite effect.