The outcome of the Boston Massacre in colonial American history was pivotal, as it galvanized public sentiment against British rule. Occurring on March 5, 1770, the confrontation between British soldiers and Boston citizens led to the deaths of five colonists, igniting outrage and propaganda efforts by figures like Paul Revere and Samuel Adams. The incident intensified anti-British sentiments and was used to fuel revolutionary fervor, contributing to the unity of the colonies against British oppression. It marked a turning point in colonial resistance, laying the groundwork for the eventual push for independence.