What was it?
The Boston Tea party was a huge act of disobedience to the British Parliament. Samuel Adams and the Sons of Liberty famously threw 342 chests of tea off of three British ships near the Boston harbor, which was symbolically a massive demonstration of defiance.
Important People Involved:
The Sons of Liberty
East India Company
How this helped lead to the American Revolution:
Throwing 90,000 lbs of tea costed what would be around $1,000,000 of in today's time which was financially a huge act of defiance to Britain. Not only was it financially disobedient, but it was symbolically showing that they would make the British lose money too.