The Boston Massacre significantly escalated tensions between Britain and its American colonies. Occurring on March 5, 1770, British soldiers shot into a crowd of colonists, killing five men. This event rapidly became a symbol of British oppression and brutality, fueling anti-British sentiments. Colonists viewed it as evidence of the need for resistance against British rule, resulting in increased calls for unity and action, culminating in events like the First Continental Congress. The incident was effectively used as propaganda by leaders such as Paul Revere and Samuel Adams to rally support for the colonial cause, ultimately contributing to the American Revolution.