The American Revolution began in 1763 after the French threat to British colonies ended. Britain imposed taxes and laws on the colonies to pay for costs of the empire, but the colonies lacked representation in Parliament and considered these laws illegitimate. Conflict intensified in the 1770s with events like the Boston Tea Party, leading the colonies to demand full rights as British citizens. In 1775, fighting broke out between British troops and armed colonists, marking the beginning of the American Revolution. The revolution had broad intellectual and social impacts, including new republican ideals that took hold and caused changes to the traditional social hierarchy.