The outcome of the Boston Massacre, which occurred in 1770, was the deaths of five colonists at the hands of British soldiers, which fueled anti-British sentiments. The incident began as a confrontation between colonists and British troops, escalating into violence when shots were fired. The event was leveraged by patriot leaders like Samuel Adams to galvanize public outrage against British oppression and promote unity among the colonies. It played a crucial role in the growing revolutionary fervor that ultimately led to the American Revolution, symbolizing the struggle for justice and rights against imperial authority.