In the colonial era, Americans insisted on their rights as Englishmen to have their own legislature raise all taxes. The British Parliament, however, asserted in 1765 that it held supreme authority to lay taxes, and a series of American protests began that led directly to the American Revolution. The first wave of protests attacked the Stamp Act of 1765, and marked the first time that Americans met together from each of the 13 colonies and planned a common front against British taxation. The Boston Tea Party of 1773 dumped British tea into Boston Harbor because it contained a hidden tax that Americans refused to pay. The British responded by trying to crush traditional liberties in Massachusetts, leading to the American revolution starting in 1775.