What was the first gathering of elected representatives from several American colonies to protest against British taxation called?

The first gathering of elected representatives from several American colonies to protest against British taxation was known as the Stamp Act Congress. This historic meeting took place in 1765 in response to the Stamp Act, a law that imposed a direct tax on various printed materials, which was strongly opposed by the colonists. Delegates from nine colonies convened to address their grievances and assert that only colonial legislatures had the authority to tax them, marking one of the first united actions taken by the colonies against British policies. This Congress laid the groundwork for future collective actions and was significant in fostering a sense of unity among the colonies in their resistance to British rule.