Final answer:
The massive rebellion against the British broke out in 1775 with armed skirmishes at Lexington and Concord.
Explanation:
The massive rebellion against the British broke out in 1775 when armed skirmishes occurred between colonists and British soldiers at Lexington and Concord, marking the beginning of the American Revolutionary War. This rebellion was fueled by events like the Boston Massacre, the Boston Tea Party, and the British attempts to suppress colonial resistance.
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