The Boston Massacre was a confrontation in Boston on March 5, 1770, in which nine British soldiers shot several of a crowd of three or four hundred who were harassing them verbally and throwing various projectiles. The event was heavily publicized as "a massacre" by leading Patriots such as Paul Revere and Samuel Adams.^[12] British troops had been stationed in the Province of Massachusetts Bay since 1768 in order to support crown-appointed officials and to enforce unpopular Parliamentary legislation.

Amid tense relations between the civilians and the soldiers, a mob formed around a British sentry and verbally abused him. He was eventually supported by seven additional soldiers, led by Captain Thomas Preston, who were hit by clubs, stones, and snowballs. Eventually, one soldier fired, prompting the others to fire without an order by Preston. The gunfire instantly killed three people and wounded eight others, two of whom later died of their wounds.^[12]

The crowd eventually dispersed after acting governor Thomas Hutchinson promised an inquiry, but they reformed the next day, prompting the withdrawal of the troops to Castle Island. Eight soldiers, one officer, and four civilians were arrested and charged with murder, and they were defended by future U.S. president John Adams. Six of the soldiers were acquitted; the other two were convicted of manslaughter and given reduced sentences. The two found guilty of manslaughter were sentenced to branding on their hand.