The tensions between the colonists and the British troops came to a head in events that became known as the Boston Massacre, an event whose dramatic retelling helped galvanize support for revolution.
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Additional Links:
A history channel article about the Boston Massacre.
https://www.history.com/this-day-in-history/the-boston-massacre
A quick overview of the Boston Massacre from the History channel.
https://www.history.com/topics/american-revolution/boston-massacre